Drive off (7)
'drive off' is the definition.
(synonyms)
This is all the clue.
(Other definitions for repulse that I've seen before include "Send back" , "Drive back by force" , "Disgust" , "Beat off -- rebuff" , "Fend off" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drive off</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for repel that I've seen before include "Put off - disgust" , "Nauseate" , "give you the creeps" , "Hold off" , "push off" .)