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"oversight" is also used as a crossword clue. If that's what you saw, the answer is often supervision (11 letters).
Definitions
a mistake resulting from inattention
Word origin
From over- + sight. Verb sense 2 is a semantic loan from German Aufsicht.
Used in a sentence
“A small oversight at this stage can lead to big problems later.”
“oversight mechanism”
“The bureaucracy was subject to government oversight.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Supervision, or a mistake”9 letters
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