Wiktionary
clean sheet
n. (context soccer English) A game played without having conceded a goal.
Usage examples of "clean sheet".
It all goes to prove that a clean sheet helps a man though mine wasn't nothing to be ashamed of.
He drew a clean sheet of paper from the sidedrawer and began to make notes.
I set them on a clean sheet of white paper, careful not to ruin potential fingerprints.
Centered on the light table to his left was a clean sheet of white paper, and I leaned closer to take a look.
The blue gown was pulled up out of the way and a clean sheet spread to cover her nakedness, and the time went slowly for some, swiftly for others.