Extinct (7)
I believe the answer is:
defunct
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">extinct</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 defunct that I've seen before include "Fund etc for the dead" , "No longer living or in force" , "No longer in working order" , "Dead or finished" , "Obsolete" .)