A clenched fist.    From Wordnet, Princeton University. 

Verb (used without object) : His hands clenched as he faced his enemy.    From Dictionary.com. 

Verb (used with object) : After they clinched the deal they went out to celebrate. ,He drove the nails through the board and clinched the points flat with a hammer.    From Dictionary.com. 

Verb (used without object) : The boxers clinched and were separated by the referee.    From Dictionary.com. 

"Well," said Mrs. Fox, firmly, as if the name clenched the matter.    From Wordnik.com.  [Poor, Dear Margaret Kirby] Reference

As I ran down the streets to the sea, the coin clenched tight in my fist, I felt all the.    From Wordnik.com.  [The Wisdom of Father Brown] Reference

"Forgive me," he mumbled through pain clenched teeth, as they drew in their first air again.    From Wordnik.com.  [The Kanaka Surf] Reference

I ask, the word clenched between my teeth.    From Wordnik.com.  [Vanishing Acts]

Berlusconi clenched his jaw, then flashed a smile.    From Wordnik.com.  [Sex, Religion & Politics] Reference

She never looked back as Chisame clenched her fist.    From Wordnik.com.  [Arcana Magi - c.19: Opportunity Arising] Reference

He clenched his fist trying to steady the vibration.    From Wordnik.com.  [Freedom] Reference

We went back in with steely gazes and clenched jaws.    From Wordnik.com.  [Battle of the Bulging British Bridesmaids] Reference

Fynir clenched his fist and roared out into the air.    From Wordnik.com.  [Arcana Magi - c.17: Separation] Reference

She clenched her teeth and pushed the creature back.    From Wordnik.com.  [Arcana Magi - c.13: Along the Way] Reference

Michael clenched his teeth with a long inhale of air.    From Wordnik.com.  [The Impossible Man - Ep.13: March of the Steel Giant] Reference

She clenched her hands into a fist and smiled happily.    From Wordnik.com.  [The Impossible Man - Ep.4: The Chupacabra is Out There] Reference

With her hands clenched at her side, she began to bawl.    From Wordnik.com.  [Divorce Is Hard For Adult Children Too] Reference

You've talked about a compromise of pain and clenched teeth.    From Wordnik.com.  [The Bitter Taste of Dreams Come True] Reference

He speaks in a Midwestern monotone, but the jaw is clenched.    From Wordnik.com.  [Riding The Wave] Reference

She clenched the towel tight by her chest and Michael smirked.    From Wordnik.com.  [The Impossible Man - Ep.15: Journey and a Half] Reference

His mouth clenched and the muscles of his jaw worked in and out.    From Wordnik.com.  [‘My Father’s Secret War’] Reference

Kaori said as Yuki clenched her hair to hold her sanity together.    From Wordnik.com.  [The Impossible Man - Ep.15: Journey and a Half] Reference

His fingers are clenched into tight fists, the skin stretched taut.    From Wordnik.com.  [Ever. Happily. After.] Reference

Chisame took her brooch off her shirt and clenched it into her fist.    From Wordnik.com.  [Arcana Magi - c.19: Opportunity Arising] Reference

"He had his finger in my face, his other hand was clenched in a fist.".    From Wordnik.com.  [Native American farmers and ranchers press USDA on bias complaints] Reference

"I felt like I was nothing," says Riddick, her fists clenched in anger.    From Wordnik.com.  [A SHAMEFUL LITTLE SECRET] Reference

She clenched her head as Kyo pushed his way through the bushes past her.    From Wordnik.com.  [Arcana Magi - c.18: Me?] Reference

Len raised one arm up into the air, fist clenched, and threw his head back.    From Wordnik.com.  [Electricscooterland] Reference

Simpson, at the defense table, swallowed heavily and clenched his jaw muscles.    From Wordnik.com.  [Body of Evidence] Reference

I clenched my fists in the dark, wondering if you'd notice I was holding still.    From Wordnik.com.  [Summer XVI] Reference

Brie's eyes twitched as Chisame covered her mouth and Danica clenched her teeth.    From Wordnik.com.  [Arcana Magi - c.29: Without a Fight] Reference

She clenched her teeth, not so much to resist the enchantment, but to not feel weak.    From Wordnik.com.  [Arcana Magi - c.20: Compelling] Reference

The winged girl clenched her fist as Brie, Chisame, and Danica waited for an answer.    From Wordnik.com.  [Arcana Magi - c.17: Separation] Reference

The magical girl clenched her hand to her blouse as she heard Michael call out to her.    From Wordnik.com.  [The Impossible Man - Ep.16: Puerto Rican Day Parade] Reference

The winged Sentinel slipped on her bracelet, clenched her fist, and was ready to move.    From Wordnik.com.  [Arcana Magi - c.19: Opportunity Arising] Reference

His arm reached out, rigid, his fist clenched; she clasped it in one white-gloved hand.    From Wordnik.com.  [The Day Kennedy Died] Reference

Chisame took her brooch off her shirt and clenched it into her fist as Lyn walked forward.    From Wordnik.com.  [Arcana Magi - c.25: Satisfaction] Reference

"" We stood as one, we clenched our fists as one and that was a rare moment for all of us. ''.    From Wordnik.com.  [Living In The Shadows Of Giants] Reference

CHRISTENSEN: No. The danger of the term is that people think you mean clenched-teeth acceptance.    From Wordnik.com.  [Loving Your Partner As A Package Deal] Reference

Her father patted her hand, “Everything will be all right,” he said through a clenched grin.    From Wordnik.com.  [And then the Heat Broke] Reference