A fine fellow, Raymond, in a fight (6)
I believe the answer is:
affray
'a fight' is the definition.
(affray is a kind of fight)
'a fine fellow raymond in' is the wordplay.
'fine' becomes 'f' (abbreviation).
'fellow' becomes 'f' (abbreviation - of a society etc.).
'raymond' becomes 'ray' (I've seen this in other clues).
'in' is an insertion indicator.
'f'+'ray'='fray'
'f' placed within 'fray' is 'ffray'.
'a'+'ffray'='AFFRAY'
(Other definitions for affray that I've seen before include "Disturbance in public place" , "A fight or riot in public" , "Brawl, disturbance" , "Disturbance of the peace" , "public brawl" .)