Soul; life force (6)
I believe the answer is:
spirit
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">soul</span>' is the first definition.<br/ ><br/ >'<span class="explanation-format__original">life force</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for spirit that I've seen before include "Distilled liquor" , "Ghost or soul" , "Eg, rum" , "Gusto" , "Strong distilled alcohol" .)