Fellow with feeble passion (5)
I believe the answer is:
flame
'passion' is the definition.
(thesaurus)
'fellow with feeble' is the wordplay.
'fellow with' becomes 'f' (I've seen this in other clues).
'feeble' becomes 'lame' ('lame' can be a synonym of 'feeble'**).
'f'+'lame'='FLAME'
(Other definitions for flame that I've seen before include "strong red" , "abusive comment" , "Sweetheart" , "Ignited gas" , "Burning gas from fire" .)