Defeated decisively (8)
I believe the answer is:
trounced
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defeated decisively</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 trounced that I've seen before include "Thrashed, beat heavily" , "Not cured after receiving heavy beating" , "Beat hollow" , "Defeated decisively" .)