Roman god of song on new record (7)
I believe the answer is:
neptune
'roman god' is the definition.
(Neptune is an example)
'song on new record' is the wordplay.
'song' becomes 'tune' (I've seen this before**).
'on' says to put letters next to each other.
'new' becomes 'n'.
'record' becomes 'ep'.
'n'+'ep'='nep'
'tune' put after 'nep' is 'NEPTUNE'.
'of' is the link.
(Other definitions for neptune that I've seen before include "World" , "Tune pen into the Roman god" , "King of the sea" , "Poseidon" , "musical work" .)