Chap gets record assistance (4)
I believe the answer is:
help
'assistance' is the definition.
(synonyms)
'chap gets record' is the wordplay.
'chap' becomes 'he'.
'gets' means one lot of letters go next to another.
'record' becomes 'lp' (abbreviation for long play record).
'he'+'lp'='HELP'
(Other definitions for help that I've seen before include "Support" , "Be of benefit to" , "Contribute to the success of" , "Come to the aid of" , "Beatles single" .)