Answer:

oversight

Answer	Crossword Clue
OVERSIGHT	Instance of carelessness
OVERSIGHT	Inadvertent omission
OVERSIGHT	Attention to detail, or lack of attention to detail

OVERSIGHT	Unconscious neglect.
OVERSIGHT	Lapse
OVERSIGHT	Careless mistake
OVERSIGHT	Careless omission
OVERSIGHT	Inadvertence
OVERSIGHT	Act of omission ... or of a commission
OVERSIGHT	Watchful care ... or careless mistake