She wanted to make a clean break with the past.

她想与过去完全断绝。

《牛津词典》

I'll start with the brief review of the reasons for the change that we really need to make a clean break to restart growth.

首先，我会简短地回顾一下改革的原因，我们确实需要进行彻底的变革，再次实现增长。

youdao

I hope that these facts I have stated in this letter may determine you to make a clean break with your past and start afresh.

我希望这封信中举述的事实能使你翻然悔悟，弃旧图新。

《新英汉大辞典》

Sadly, many people are just too dependent on them to make a clean break.

FORBES: Credit Card Changes Looming: Merchants Will Be Allowed to Add Surcharges

When I spoke to Harris for my original post, he told me he planned to make a clean break with the past.

FORBES: Gerova Financial In Disarray Amid Stock Plunge

After two crushing defeats it is time to make a clean break.

BBC: David Davis statement in full