clear up phrasal verb ( see also ↑ clear )
1 . to make a place look tidier by putting things back where they belong:
I don’t mind you using the kitchen as long as you clear up afterwards.
clear something ↔ up
Adam, clear up this mess before your father sees it.
clear up after
I get really tired of clearing up after you (=tidying places that you have made untidy) .
2 . clear something ↔ up to explain or solve something, or make it easier to understand:
The White House hopes these problems can be cleared up soon.
There are a couple of points we need to clear up before the meeting begins.
3 . if the weather clears up, it gets better
4 . if an illness or infection clears up, it disappears