Wildebeest (3)

I believe the answer is:
gnu
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wildebeest</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gnu that I've seen before include "Animal" , "Wildebeest" , "animals" , "Large heavy antelope" , "Antelope sounds as if it has knowledge" .)