make a clean breast of

This is just why you need to make a clean breast of your income and expenses while making an application.(这是为什么你要和盘托出你的收入和支出，而提出申请。)

His guilty conscience forced him to make a clean breast of everything.(他的内疚使得他把一切和盘托出。)

It was then, he said, that he had decided to make a clean breast of matters.(就在那一刻，他就决定坦白自己的罪行。)

You ought to make a clean breast of the whole matter.(你应该坦白的讲出整个事情全过程。)