Slight pain (6)
I believe the answer is:
twinge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slight pain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for twinge that I've seen before include "Slight pang, maybe of conscience" , "Brief sharp pain" , "Emotional pang" , "Pinch" , "Sharp pang" .)