Bird not entirely demure (3)

I believe the answer is:

emu

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

'not entirely demure' is the wordplay.
'not entirely' indicates a hidden word.
'EMU' is hidden within 'demure'.

(Other definitions for emu that I've seen before include "Parky's nemesis" , "Flightless Aus. bird" , "Physics unit" , "Australian bird related to the ostrich" , "Big bird" .)

I've seen this clue in The Times.

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