Bird, overweight at first, taken in by squad (7)

I believe the answer is:

rooster

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

I can't explain the rest of the clue.

(Other definitions for rooster that I've seen before include "Domestic cock" , "Morning caller" , "American cockerel" , "Farmyard fowl" , "Adult male chicken" .)

I've seen this clue in The Hindu.

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