Bullfighter felt endless love (7)
I believe the answer is:
matador
'bullfighter' is the definition.
(synonyms)
'felt endless love' is the wordplay.
'felt' becomes 'mat'.
'endless love' becomes 'ador' (I am not sure about this - if you are sure you should believe this answer much more).
'mat'+'ador'='MATADOR'
Can you help me to learn more?
(Other definitions for matador that I've seen before include "The one who kills the bull" , "Performer in the Ring" , "fighter in the ring?" , "who does for bulls" , "Principal bullfighter" .)