to make a place tidy by removing things from it or putting them where they should be

Dad was clearing up in the kitchen. 爸爸正在收拾厨房。

I'm tired of always having to clear up after you (= tidy your things). 我厌烦了老是要替你整理东西。

If an illness clears up, or if medicine clears an illness up, the illness goes away.

You won't be able to go swimming tomorrow if your cold hasn't cleared up. 如果感冒还不好，明天你就不能去游泳了。

These pills should clear your rash up. 这些药会让你的疹子消掉。

to give or find an explanation for something, or to deal with a problem or argument

They never cleared up the mystery of the missing money. 他们一直没搞清楚钱是怎么不翼而飞的。

After 20 years the case has finally been cleared up. 20年后，这个案子终于真相大白。

If the weather clears up, the cloud and rain disappear.

I hope it clears up in time for the picnic. 我希望到野餐时天气会放晴。