Write back with a melody from 'The Planets (7)
I believe the answer is:
neptune
'planets' is the definition.
(I know that Neptune is a superior planet)
'write back with a melody' is the wordplay.
'write' becomes 'pen' (synonyms).
'back' says the letters should be written backwards.
'with' means one lot of letters go next to another.
'a melody' becomes 'tune' (synonyms).
'pen' reversed gives 'nep'.
'nep'+'tune'='NEPTUNE'
'from 'the' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for neptune that I've seen before include "Planet, identified 1846" , "Roman sea god - planet" , "one of the Planets" , "heavenly body" , "Holst piece" .)