Backlash (8)

I believe the answer is:
reaction
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">backlash</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 reaction that I've seen before include "Response to stimulus from creation" , "Result of stimulus" , "counter-revolution" , "In mechanics, every action has an equal and opposite one" , "Feedback" .)