Impassioned former lover advanced (7)
I believe the answer is:
excited
'impassioned' is the definition.
(thesaurus)
'former lover advanced' is the wordplay.
'former lover' becomes 'ex'.
'advanced' becomes 'cited' (both can mean to suggest an example).
'ex'+'cited'='EXCITED'
(Other definitions for excited that I've seen before include "Aroused; eager" , "moved by emotion" , "Feeling a pleasant tension" , "Animated" , "Roused by strong emotion" .)