Hyperbole (8)
I believe the answer is:
overkill
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hyperbole</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 overkill that I've seen before include "Hyperbole" , "Action far more drastic than necessary" , "Excessive action, armament" , "much more than required" , "Excessive effort for task - sounds deadly" .)