Quivers (8)
I believe the answer is:
trembles
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">quivers</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for trembles that I've seen before include "Quivers" , "Shivers involuntarily as from fear" .)