Devise set arrangement for Holst's work (7)
I believe the answer is:
planets
'holst's work' is the definition.
I can't judge whether this definition defines the answer.
'devise set arrangement' is the wordplay.
'devise' becomes 'plan' (synonyms).
'arrangement' indicates an anagram.
'set' is an anagram of 'ets'.
'plan'+'ets'='PLANETS'
'for' is the link.
Can you help me to learn more?
(Other definitions for planets that I've seen before include "Ten laps (anag.)" , "Celestial bodies" , "Heavenly bodies" , "Big bodies" .)