No longer operative (7)
I believe the answer is:
defunct
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">no longer operative</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for defunct that I've seen before include "Fund etc for the dead" , "No longer alive" , "Inoperative" , "dead and gone" , "Out of commission" .)