finish off vs clear up

finish off and clear up both are verbs.

Word	Noun	Adjective	Verb	Adverb
finish off	No	No	Yes	No
clear up	No	No	Yes	No

As verbs, finish off and clear up are synonyms defined as:

Other synonyms of finish off include finish up, get through, mop up, polish off, wrap up.

finish off (verb)	clear up (verb)
finish a task completely	free (the throat) by making a rasping sound
	finish a task completely
	make free from confusion or ambiguity; make clear
	make clear and (more) comprehensible
	become clear