1.
a complete separation from a person, an organization, a way of life, etc. :
She wanted to make a clean break with the past.
2.
a break in a bone in one place
A CLEAN BREAK
Meaning of A CLEAN BREAK in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005