Cosy starship renovated for study of celestial bodies (12)
I believe the answer is:
astrophysics
'study of celestial bodies' is the definition.
'astrophysics' can be an answer for 'study' (astrophysics is a kind of study). I'm unsure of the 'of celestial bodies' bit.
'cosy starship renovated' is the wordplay.
'renovated' indicates an anagram.
'cosy'+'starship'='cosystarship'
'cosystarship' with letters rearranged gives 'ASTROPHYSICS'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for astrophysics that I've seen before include "Branch of science" , "Science of stars and galaxies" , "Science of the properties of celestial bodies" .)