Powerlessness (9)
(Other definitions for impotence that I've seen before include "Weakness" , "ineffectualness" , "Helplessness, powerlessness" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">powerlessness</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 inability that I've seen before include "Lack of knack!" , "Lack of sufficient power or means" , "Powerlessness" , "Lack of capacity for action" , "Impotence, incapacity" .)