Fellow with feeble passion (5)
I believe the answer is:
flame
'passion' is the definition.
(as in the flame of a relationship)
'fellow with feeble' is the wordplay.
'fellow' becomes 'F' (abbreviation - of a society etc.).
'with' means one lot of letters go next to another.
'feeble' becomes 'lame' (lame can mean feeble or pathetic).
'f'+'lame'='FLAME'
(Other definitions for flame that I've seen before include "strong red" , "abusive comment" , "Sweetheart" , "Ignited gas" , "Burning gas from fire" .)