1.
When you ~ 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 ~ 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 ~ 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 ~ 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