Unwillingness (10)
I believe the answer is:
reluctance
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unwillingness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(reluctance is a kind of unwillingness)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for reluctance that I've seen before include "averse reaction" , "Wariness" , "Unwillingness (to do something)" , "Hesitation" .)