Is this your crossword clue?
"imperfection" is also used as a crossword clue. If that's what you saw, the answer is often flaw (4 letters).
Definitions
the state or an instance of being imperfect
Word origin
From Old French imperfeccion, see im- + perfection.
Used in a sentence
“You can accept your imperfection or try to improve.”
“And for the first time she realised what it was to escape from the smallish perfection of England, into the grander imperfection of a great continent.”
“He loves me despite my imperfections.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Small flaw”12 letters
02“Flaw”12 letters
Not quite right?
"Search similar patterns."
I___________