Defensible (7)
I believe the answer is:
tenable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defensible</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 tenable that I've seen before include "Capable of being kept" , "Able to be believed" , "Able to be defended against attack or objection" , "Of argument, rational and defensible" , "Able to be held" .)