Mettle (6)
I believe the answer is:
spirit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mettle</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 spirit that I've seen before include "Jinn" , "Demon - drink" , "Phantom, ghost" , "Scotch, maybe" , "Liveliness - hard liquor" .)