come clean (with somebody) (about something)idiomPart ofcleancome clean (with somebody) (about something)come clean (with somebody) (about something) — idiomidiom1. To finally tell the truth about something you have been hiding.1.idiomDefinitionTo finally tell the truth about something you have been hiding.ExampleAfter weeks of lies, Tom came clean about the missing money.Why don't you come clean with your parents about the accident?