clear up

clear up idiom
  1. Clarify, explain, solve, as in Let's try to clear up this misunderstanding. [Late 1600s]
  2. Become clear, as in After the storm, it cleared up very quickly. [Early 1600s]
  3. Return something to a normal condition, cure, as in This new salve will clear up your rash.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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