Benumb (6)
I believe the answer is:
deaden
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">benumb</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for deaden that I've seen before include "Muffle (sound)" , "Blunt, numb" , "Muffle impact" , "Benumb" , "Muffle, make muted" .)