Crossword Genius

Fly-hitting device (4)

Ross

I believe the answer is:

swat

(Other definitions for swat that I've seen before include "'Twas quite a smack" , "Hit hard, say fly, with something flat" , ".`Twas quite a blow" , "strike smartly" , "Hit (insect) sharply" .)

I've seen this clue in The Times.
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