Veteran, Tommy Sr., gone (5)
I believe the answer is:
oldie
'veteran' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for oldie that I've seen before include "Mature person; magazine" , "Song of yesteryear" , "Publication" , "Perennially popular song or film, often golden" , "Standard song" .)