Blowfly (10)

I believe the answer is:

bluebottle

'blowfly' is the definition.
(bluebottle is a kind of blowfly)

This is the entire clue.

(Other definitions for bluebottle that I've seen before include "Blowfly - policeman" , "Common blowfly" , "Officer" , "Copper - fly" , "An insect; Goon character" .)

I've seen this clue in The Mirror and the Evening Standard.

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