Bird returns priceless costume (3)

I believe the answer is:

emu

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'bird' is the definition.
(emu is a type of bird)

I can't explain the remainder of the clue.

(Other definitions for emu that I've seen before include "Australian non-flyer" , "Aussie bird" , "Flightless Aus. bird" , "Large Australian flightless bird" , "that doesn't get off the ground" .)

I've seen this clue in The Globe and Mail.

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