Kiwi's kin (3)
I believe the answer is:
moa
'kiwi's kin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for moa that I've seen before include "was hunted by Maori" , "Flightless bird once found in New Zealand" , "Bird lost" , "Gigantic extinct bird" , "Bird's gone for ever" .)