'clean up' definitions:

Definition of 'clean up'

From: WordNet
verb
Put (things or places) in order; "Tidy up your room!" [syn: tidy, tidy up, clean up, neaten, straighten, straighten out, square away]
verb
Make a big profit; often in a short period of time; "The investor really cleaned up when the stock market went up"
verb
Dispose of; "settle the bills"
verb
Make oneself clean, presentable or neat; "Clean up before you go to the party"

Synonyms of 'clean up'

From: Moby Thesaurus