WordNet sense 1 (make straight):

straighten

WordNet sense 2 (extricate from entanglement):

disentangle, unsnarl

WordNet sense 3 (make free from confusion or ambiguity; make clear):

clear, crystallize, elucidate, enlighten, illuminate, crystalise, crystalize, crystallise, clear up, shed light on, sort out

WordNet sense 4 (put (things or places) in order):

neaten, tidy, clean up, square away, tidy up

WordNet sense 5 (settle or put right):

iron out, put right

WordNet sense 6 (change for the better):

reform, reform, see the light