Incapable (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">incapable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for unable that I've seen before include "Incompetent sort of nebula" , "Not in a position (to)" , "Nebula (anag)" , "Not having the neccessary means" , "Not having the necessary means or skill or know-how" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">incapable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for unfit that I've seen before include "Ill-equipped" , "Inapt" , "struggling to keep up?" , "In bad physical condition" , "Not healthy" .)