Artist is a mover in some circles? (6)
I believe the answer is:
turner
I believe this is a double definition.
'artist' is the first definition.
(painter JMW Turner)
'a mover in some circles?' is the second definition.
(something turning around)
'is' is the link.
(Other definitions for turner that I've seen before include "Worker with a lathe, like great English painter" , "JMW ------, English artist renowned for his land- and sea-scapes" , "He painted Rain, Steam and Speed - The Great Western Railway" , "Lathe worker; a water-colourist" , "Artist - wheel?" .)