Apteryx (4)
I believe the answer is:
kiwi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">apteryx</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for kiwi that I've seen before include "Hairy fruit with green flesh" , "Sacred Japanese peak" , "New Zealander (informal)" , "New Zealand bird that does not fly" , "Symbol of New Zealand" .)