A downy bird (5)

I believe the answer is:

eider

'a downy bird' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for eider that I've seen before include "ie Red (anag.)" , "Duck from which down is obtained" , "Reed I turn into a duck" , "Sea bird" , "Duck valued for its fine soft down" .)

I've seen this clue in the Evening Standard.

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