Driver and creator of great cycle rounding turn (8)
I believe the answer is:
waggoner
'driver' is the definition.
(I know that waggoner is a type of driver)
'creator of great cycle rounding turn' is the wordplay.
'creator of great cycle' becomes 'wagner' (I can't justify this - if you can you should believe this answer much more).
'rounding' indicates putting letters inside (some letters go round others).
'turn' becomes 'go' (a person's move in a board game).
'wagner' going around 'go' is 'WAGGONER'.
'and' is the link.
Can you help me to learn more?
(Another definition for waggoner that I've seen is " Old driver".)