Having no meaning (11)
I believe the answer is:
nonsensical
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">having no meaning</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 nonsensical that I've seen before include "Without meaning" , "Absurd, idiotic" , "Like rubbish" , "Ridiculous" , "Meaningless" .)