Zeal, eagerness (10)
I believe the answer is:
enthusiasm
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">zeal</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">eagerness</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 enthusiasm that I've seen before include "Ardour" , "Intense and lively interest" , "Gusto; fervour" , "Zeal" , "Avidity" .)