Hawaiian goose (4)
I believe the answer is:
nene
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hawaiian goose</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nene that I've seen before include "River navigable to Northampton" , "Hawaiian goose; English river" , "Rare bird" , "Peterborough's river" , "Northants river" .)