Is defeated (5)
I believe the answer is:
loses
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">is defeated</span>' is the definition.<br/ ><span class="explanation-format__explanation">(to lose is to be defeated)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for loses that I've seen before include "Goes down" , "Fails to win" , "Misoplaces" , "Misplaces" , "Mislays or is defeated" .)