Crossword Genius

Extinct bird’s endless complaint (3)

Ross

I believe the answer is:

moa

'extinct bird's' is the definition.
(extinct flightless bird of New Zealand)

'endless complaint' is the wordplay.
'endless' means to remove the last letter.
'complaint' becomes 'moan' (a moan is a complaint or objection).
'moan' with its final letter taken off is 'MOA'.

(Other definitions for moa that I've seen before include "bird that became extinct" , "Bird that died out" , "Bird no longer" , "Extinct flightless bird of New Zealand" , "Gigantic extinct bird" .)

I've seen this clue in The Times.
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