Moan, grumble (6)
I believe the answer is:
whinge
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">moan</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">grumble</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for whinge that I've seen before include "Whine and grumble persistently" , "Hewing (anag.)" , "Complain, whine" , "Grumble or complain persistently" , "Complain peevishly" .)