Record — piece of music (4)
I believe the answer is:
note
'record' is the definition.
(note is a kind of record)
'piece of music' is the wordplay.
'piece' becomes 'n' (abbreviation for Knight in chess notation**).
'of' becomes 'o'.
'music' becomes 'te'.
'n'+'o'+'te'='NOTE'
(Other definitions for note that I've seen before include "A piece of paper money" , "Eg, minim" , "Single tone; short letter" , "Annotation; tone" , "Short message; piano key" .)