What does "clean" mean in slang?

In slang, clean has several meanings beyond hygienic, depending on context and community. Most commonly, to be clean means to be free from drugs or alcohol, especially after addiction, for example he has been clean for six months means sober and not using. In hip-hop and street slang, clean can mean stylish, well-dressed, or looking good, such as those shoes are clean meaning fashionable and fresh. It can also mean innocent or not having a criminal record, for example his record is clean. In sports, a clean play means fair and not cheating. In music, clean version of song means edited version without explicit lyrics. In dating slang, clean can mean free from STIs or well-groomed. In gaming, clean can mean skillful execution without mistakes. In drug culture, clean can mean not carrying drugs or weapons when searched by police. In general slang, clean can mean something done well, like a clean shot in basketball. The meaning is context dependent, but common thread is purity, innocence, or absence of something negative like drugs, dirt, or criminal history. In hospital slang, clean patient means not infectious, as opposed to needing negative pressure isolation for airborne disease. So clean in slang often conveys positive status of being free from problems.