Unexpected victory (5)
I believe the answer is:
upset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unexpected victory</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 upset that I've seen before include "Unhappy or worried state of mind" , "Unexpected sports outcome" , "Disturbed or capsized" , "Sad" , "Upheaval" .)