NZ bird
I believe the answer is:
kiwi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nz 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 "N Zealand bird" , "Enzedder; flightless bird" , "New Zealander (informal)" , "Chinese gooseberry" , "Rutherford was one" .)