Crush, put down (8)
I believe the answer is:
suppress
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">crush</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">put down</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for suppress that I've seen before include "Prevent from being publicised" , "Forcibly keep down" , "Prevent the dissemination of, information say" , "Crush, put down" , "squash" .)