clear up

make clear and (more) comprehensible; "clarify the mystery surrounding her death"

finish a task completely; "I finally got through this homework assignment"

free (the throat) by making a rasping sound; "Clear the throat"

become clear; "The sky cleared after the storm"

make free from confusion or ambiguity; make clear; "Could you clarify these remarks?"; "Clear up the question of who is at fault"