Backward group playing records (5)
I believe the answer is:
notes
'records' is the definition.
(note is a kind of record)
'backward group playing' is the wordplay.
'backward' shows that the letters should be reversed in order.
'group' becomes 'set' (both can mean a collection).
'playing' becomes 'on' (on can mean playing or performing).
'set'+'on'='seton'
'seton' written backwards gives 'NOTES'.
(Other definitions for notes that I've seen before include "Short missives" , "Sees" , "Short written messages" , "Written comments" , "Lines" .)