Gorillas or gibbons, eg (4)
I believe the answer is:
apes
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">gorillas</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(gorillas are apes)</span><br/ ><br/ >'<span class="explanation-format__original">gibbons eg</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(gibbon is a kind of ape)</span><br/ ><br/ ></span>
(Other definitions for apes that I've seen before include "Zoo animals" , "Large primates" , "Imitates like primates" , "Peas (anag)" , "Imitates in every aspect" .)