Not relevant (12)
I believe the answer is:
inapplicable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not relevant</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 inapplicable that I've seen before include "Not relevant" , "Inappropriate - irrelevant" .)