Let the muddy water stand overnight so it will clear up.
•A strong wind blew in and cleared up the smoke in the air.
2. to explain something; to solve a mystery. •I think that we can clear this matter up without calling in the police.
•First we have to clear up the problem of the missing jewels.
3. to cause a rash or inflammation to return to normal; to cause skin to “clear.” •There is some new medicine that will clear your rash up.
4. to cure a disease or a medical condition. •The doctor will give you something to clear up your congestion.