Record by that man, old song (4)
I believe the answer is:
help
'old song' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'record by that man' is the wordplay.
'record' becomes 'lp' (abbreviation for long play record).
'by' is a charade indicator (letters next to each other).
'that man' becomes 'he' (pronoun for a man).
'lp' put after 'he' is 'HELP'.
Can you help me to learn more?
(Other definitions for help that I've seen before include "Hit from Band" , "Guide" , "Support" , "Come to the aid of" , "record by the Beatles" .)