Defeated competitor (5)
I believe the answer is:
loser
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defeated competitor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for loser that I've seen before include "One who is habitually unsuccessful" , "One not winning" , "one plays without success" , "A failure, also-ran" , "Ineffectual person who regularly fails" .)