It seems clear that an elephant-like animal, a mastodon or gomphothere, extinct for 12,000 years, was the intended consumer of avocados.    From Wordnik.com.  [A Third Ghost] Reference

The gomphothere was likely hunted by the Clovis people.    From Wordnik.com.  [Signs of the Times] Reference

"This is the first kill site I've ever heard of in North America," said W. David Lambert, a gomphothere expert at the Louisiana School of Science, Mathematics and Arts. "That's a pretty important discovery.".    From Wordnik.com.  [azcentral.com | news] Reference