Name record, piece of music, part of an orchestral suite (7)
I believe the answer is:
neptune
'part of an orchestral suite' is the definition.
(part of Gustav Holst's The Planets)
'name record piece of music' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'record' becomes 'EP' (abbreviation for extended play record).
'piece of music' becomes 'tune' (a tune is a piece of music).
'n'+'ep'+'tune'='NEPTUNE'
(Other definitions for neptune that I've seen before include "King of the sea" , "Sea god - outer planet" , "Poseidon" , "Eighth planet from the Sun" , "Roman sea-god" .)