Dental pain (9)
I believe the answer is:
toothache
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dental 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 toothache that I've seen before include "Dental pain" , "Trouble with choppers" , "Cause of sore mouth" , "It causes grief" , "Oral discomfort" .)