Parties with the old bird (4)

I believe the answer is:

dodo

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'old bird' is the definition.
(extinct bird)

I can't explain the rest of the clue.

(Other definitions for dodo that I've seen before include "Old fogey" , "E [EXTINCT] bird" , "Large extinct bird" , "Idiot" , "Bird (whose style of very out of fashion)" .)

I've seen this clue in the Sydney Morning Herald.

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