Defeated one (5)
I believe the answer is:
loser
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defeated one</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for loser that I've seen before include "Winner's opponent" , "No-hoper" , "Opposite of winner" , "Unsuccessful person" , "One failing regularly" .)