Assist the fellow with record (4)
I believe the answer is:
help
'assist' is the definition.
('help' can be a synonym of 'assist')
'the fellow with record' is the wordplay.
'the fellow' becomes 'he' (I've seen this in other clues).
'with' is a charade indicator (letters next to each other).
'record' becomes 'lp' (LP is an example).
'he'+'lp'='HELP'
(Other definitions for help that I've seen before include "Contribute to the success of" , "Beatles' album; assist" , "Be of service" , "Assistance" , "Lend a hand" .)