Grunts (5)
I believe the answer is:
oinks
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grunts</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 oinks that I've seen before include "Beastly sounds" , "High-pitched pig noises" , "Grunts" , "beastly noise" , "Noises from pens" .)