"Make a clean breast of something" is an idiom that means to confess to something or to reveal the truth about a situation. There are several synonyms for this phrase, including "come clean," "confess," "disclose," "reveal," "admit," and "acknowledge." These phrases are often used in situations where someone has been keeping a secret or hiding the truth about something. By making a clean breast of something, they can alleviate the guilt and consequences of their actions. It is important to be honest and truthful in all relationships and situations, and using synonyms for this phrase can help individuals communicate effectively and transparently.