finish up vs clear up

finish up and clear up both are verbs.

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

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

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

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