Repel (7)
I believe the answer is:
repulse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">repel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for repulse that I've seen before include "Drive back by force" , "Check" , "Beat back" , "Beat off -- rebuff" , "Fend off" .)