Negative reaction (8)
I believe the answer is:
backlash
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">negative reaction</span>' is the definition.<br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for backlash that I've seen before include "Hostile reaction" , "Provoked adverse reaction" , "Violent reaction to event, like reverse whip" , "Repercussion" , "Violent reaction to an event - using whip?" .)