At a fast, good, steady, etc. clip American phrase informal
Used to describe a pace that is fast, good, steady, etc.
The traffic during the rush hours usually moves at a slow clip.
The train was moving at a good clip.
The origin of this phrase is not clear.
To decide to believe someone‘s saying although they may not tell the truth
He said that he was late because he had an accident and I gave him the benefit of the doubt.