1. make a clean breast - Verb
2. make a clean breast - Phrase
make a clean breast (third-person singular simple present makes a clean breast, present participle making a clean breast, simple past and past participle made a clean breast)
(idiomatic) Often followed by of: to be honest about something; to confess.
Synonyms: see Thesaurus:confess
No virtue ever was founded on a lie. The truth, then, at all risks and costs - the truth from the beginning. Make a clean breast to whomsoever you need to make it, and then - face the world. Dinah Craik
It is the courage to make a clean breast of it in the face of every question that makes the philosopher. Arthur Schopenhauer