1.
When you clear up or clear a place up , you tidy things and put them away.
After breakfast they played while I cleared up...
I cleared up my room.
PHRASAL VERB : V P , V P n (not pron) , also V n P
2.
To clear up a problem, misunderstanding, or mystery means to settle it or find a satisfactory explanation for it.
During dinner the confusion was cleared up: they had mistaken me for Kenny.
= sort out
PHRASAL VERB : V P n (not pron) , also V n P
see also clear-up
3.
To clear up a medical problem, infection, or disease means to cure it or get rid of it. If a medical problem clears up , it goes away.
Antibiotics should be used to clear up the infection...
Acne often clears up after the first three months of pregnancy.
PHRASAL VERB : V P n (not pron) , V P , also V n P
4.
When the weather clears up , it stops raining or being cloudy.
It all depends on the weather clearing up.
PHRASAL VERB : V P