go legit
To begin behaving honestly after previous involvement with nefarious or illegal activities. Yes, he got into a lot of trouble when he was a teenager, but he's gone legit now, I swear.
go legit
begin to behave honestly after a period of illegal activity. informal Legit was originally a late 19th-century theatrical abbreviation meaning ‘a legitimate actor’, that is, one who acts in ‘legitimate theatre’ (conventional or serious drama).