Gambler's woe (4)
I believe the answer is:
loss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gambler's woe</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 loss that I've seen before include "Forgetting" , "disappearance" , "Financial reverse" , "(Sporting) defeat" , "Cost" .)