Ardent love or affection (7)
I believe the answer is:
passion
I believe this is a double definition.
'ardent love' is the first definition.
(I've seen this before)
'affection' is the second definition.
(thesaurus)
(Other definitions for passion that I've seen before include "Ardour, fervour" , "thing one really cares about" , "Fervent love" , "Intense emotion, anger or love" , "Ardent emotion" .)