Turn to be enthralled by Corot at exhibition (6)
I believe the answer is:
Here is my best explanation:
'turn' is the definition.
(rotating is a kind of turning)
'enthralled by corot at exhibition' is the subsidiary indication.
'enthralled by' indicates the answer is hidden within the clue.
'rotate' is hidden in the letters of 'corot at exhibition'.
'to be' is the link.
(Other definitions for rotate that I've seen before include "Pirouette", "Revolve", "Go around", "Gyrate", "Go round and round", "Make to spin around", "Turn around an axle, swivel", "Pivot", "Turn round" and "Turn around on axis or central point".)