Ardour, zeal (7)
I believe the answer is:
fervour
This clue is a double definition.
'ardour' is the first definition.
(synonyms)
'zeal' is the second definition.
(I've seen this before)
(Other definitions for fervour that I've seen before include "Great enthusiasm" , "Passionate feeling" , "Feelings of great warmth and intensity" , "Heated feeling" , "Zeal" .)