Ardent emotion (7)
I believe the answer is:
passion
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ardent emotion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for passion that I've seen before include "Great emotion" , "Ardent emotion" , "Ardour, fervour" , "Strong emotion, anger or love" , "thing one really cares about" .)