Trivial criticism (6)
I believe the answer is:
niggle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">trivial criticism</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 niggle that I've seen before include "Trivial criticism or annoyance" , "Cause slight annoyance" , "Objection" , "A slight bother" , "Get" .)