Chap gets record aid (4)
I believe the answer is:
help
'aid' is the definition.
(I know that aid can be written as help)
'chap gets record' is the wordplay.
'chap' becomes 'he'.
'gets' is a charade indicator (letters next to each other).
'record' becomes 'lp' (abbreviation for long play record).
'he'+'lp'='HELP'
(Other definitions for help that I've seen before include "Serve" , "SOS, mayday" , "Hit from Band" , "Take what you want" , "Be of service" .)