Ardour (7)
(Other definitions for passion that I've seen before include "Rage" , "Intense emotion, anger or love" , "Fervent love" , "Ardent emotion" , "fire" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ardour</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for fervour that I've seen before include "Passionate feeling" , "Passion" , "Enthusiasm - excitement" , "Heated feeling" , "Feelings of great warmth and intensity" .)