Award-winner artist briefly back on show (12)
I believe the answer is:
exhibitioner
'award-winner artist' is the definition.
I can't tell whether this definition defines the answer.
'briefly back on show' is the wordplay.
'briefly back' becomes 'ioner' (I can't justify this - if you can you should believe this answer much more).
'on' is a charade indicator (letters next to each other).
'show' becomes 'exhibit' (exhibiting is a kind of showing).
'ioner' put after 'exhibit' is 'EXHIBITIONER'.
Can you help me to learn more?
(Another definition for exhibitioner that I've seen is " Scholar".)