make a clean sweep of something

Từ điển Oxford Advanced Learner 8th

make a clean sweep (of sth) idiom
1. to remove all the people or things from an organization that are thought to be unnecessary or need changing
•The new manager made a clean sweep of the department.
2. to win all the prizes or parts of a game or competition; to win an election completely
•China made a clean sweep of the medals in the gymnastics events.
•The opinion poll suggests a clean sweep for the Democrats.
Main entry: ↑clean_idiom