Counteracting remedy (8)
I believe the answer is:
antidote
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">counteracting remedy</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 antidote that I've seen before include "Counter to a poison" , "It couneracts poison" , "Counter-measure" , "simple remedy" , "It makes you feel better" .)