Artist upset about revolutionary elite creating studio (7)
I believe the answer is:
atelier
'studio' is the definition.
(atelier is a kind of studio)
'artist upset about revolutionary elite' is the wordplay.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'upset' is a reversal indicator.
'about' indicates putting letters inside.
'revolutionary' is an anagram indicator.
'ra' reversed gives 'ar'.
'elite' is an anagram of 'telie'.
'ar' going around 'telie' is 'ATELIER'.
'creating' is the link.
(Other definitions for atelier that I've seen before include "Tie earl up in the artist's place" , "Artist's workshop, studio" , "Artist's workroom" , "I relate to workshop used by artist" , "Designer's workshop" .)