Shout about selling bird (4)

I believe the answer is:

hawk

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'bird' is the definition.
(hawk is a kind of bird)

I can't explain the rest of the clue.

(Other definitions for hawk that I've seen before include "Bird - warmonger" , "Raptor - jingoist" , "work as door-to-door salesman" , "27 [SPIT]" , "Flog" .)

I've seen this clue in The Independent.

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