1. clear up - Noun
2. clear up - Verb
become clear
make clear and (more) comprehensible
free (the throat) by making a rasping sound
make free from confusion or ambiguity; make clear
finish a task completely
Source: WordNetclear-up
The sky cleared after the storm Source: Internet
clarify the mystery surrounding her death Source: Internet
Clear the throat Source: Internet
Could you clarify these remarks? Source: Internet
Clear up the question of who is at fault Source: Internet
I finally got through this homework assignment Source: Internet