Song of the past (5)
I believe the answer is:
oldie
'song of the past' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oldie that I've seen before include "forties film, say" , "Perennially popular song or film, often golden" , "The --, UK magazine" , "Still popular hit" , "classic film perhaps" .)