Futility (11)
I believe the answer is:
uselessness
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">futility</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 uselessness that I've seen before include "Futility" , "Lack of utility" , "Otiose quality" .)