One who's learned independently about tuition regularly played a dramatic role (10)
I believe the answer is:
'one who's learned independently' is the definition.
(autodidacts are self-taught people)
I cannot understand how the remainder of the clue works.
(Other definitions for autodidact that I've seen before include "Self-taught person" , "one not needing coach" , "Someone self-taught" , "learner without instructor" , "Self-reliant learner" .)