Meaning of “clean (sth) up” in the English Dictionary

(Definition of “clean (sth) up” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"clean sth up" in Business English

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clean sth up

phrasal verb with clean uk /kliːn/ us verb

informal to stop illegal and dishonest activity in a company, system, etc.:

Last week the Government announced plans to clean up the mortgage industry.
After the scandal, a team of marketing specialists was hired to clean up the company's image.

ENVIRONMENT to remove harmful substances or chemicals from a place or the environment:

clean up pollution/contamination/waste $250 million was spent on cleaning up groundwater contamination at the former factory's site.

(Definition of “clean sth up” from the Cambridge Business English Dictionary © Cambridge University Press)