Dismiss artistic work on celestial body (7)
I believe the answer is:
canopus
'celestial body' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see a link between them that I can't see?
'dismiss artistic work on' is the wordplay.
'dismiss' becomes 'can' (I've seen this in another clue).
'artistic work' becomes 'opus' (I've seen this before).
'on' means one lot of letters go next to another.
'can'+'opus'='CANOPUS'
Can you help me to learn more?
(Other definitions for canopus that I've seen before include "A luminary" , "Ancient Egyptian funeral jar to hold entrails" , "Ancient Egyptian vase" , "Shiner" , "Second brightest star in the sky" .)