No longer successful (6-2)
I believe the answer is:
washed-up
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">no longer successful</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 washed-up that I've seen before include "Finished" , "Done for" , "Successful no longer" , "as restaurant's dishes should be?" .)