Enthusiasm; liveliness (5)
I believe the answer is:
verve
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">enthusiasm</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">liveliness</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that verve is a type of energy)</span><br/ ><br/ ></span>
(Other definitions for verve that I've seen before include "Animation" , "Zest and exuberance" , "Dashing enthusiasm" , "Great liveliness or enthusiasm" , "Sparkle" .)