clean breast

If a client goes to a lawyer for advice the first thing the lawyer asks him to do is to make a clean breast of it.

Was it not her duty to her child, to her husband, and to herself, to instantly make a clean breast of the whole mystery?

But no, this time I am determined to make a clean breast of the thing—for I see that secrecy and solitude are what it feeds on.

Don't fib; brace up and make a clean breast of it, and if you need advice I am full of it.

But Ive made a clean breast of it to dad, and though he gave me a hard calling down, hes forgiven me.