Fail to win (4)
I believe the answer is:
lose
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fail to win</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for lose that I've seen before include "Be beaten" , "Misplace" , "Suffer a defeat" , "Fail to win" , "Mislay - fail" .)