Defeated party (5)
I believe the answer is:
loser
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defeated party</span>' is the definition.<br/ ><span class="explanation-format__explanation">(person who lost or was defeated)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for loser that I've seen before include "Generally inept" , "lemon" , "Someone who fails consistently" , "Unsuccessful person" , "Unsuccessful type" .)