Flightless New Zealand bird (4)
I believe the answer is:
kiwi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flightless new zealand bird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for kiwi that I've seen before include "Rutherford was one" , "Symbol of New Zealand" , "New Zealander (informal)" , "Someone from Auckland?" , "Hairy fruit with green flesh" .)