Defeat in sport (4)
I believe the answer is:
loss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defeat in sport</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for loss that I've seen before include "Big band leader" , "Defeat - deprivation" , "Forfeiture" , "disappearance" , "Failure to profit or succeed" .)