Idiom
have a clear conscience (about sb or sth) and have a clean conscience (about someone or sth)
Theme: GUILTLESSNESS
to be free of guilt about someone or something.I'm sorry that John got the blame. I have a clean conscience about the whole affair.I have a clear conscience about John and his problems.I didn't do it. I have a clean conscience.She can't sleep at night because she doesn't have a clear conscience.