She may take the wheel with dazzling effect (9)
I believe the answer is:
catherine
'wheel with dazzling effect' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'she may take the' is the wordplay.
'she may' becomes 'carine' (I can't justify this - if you can you should give a lot more credence to this answer).
'take' is an insertion indicator.
'carine' going around 'the' is 'CATHERINE'.
Can you help me to learn more?
(Other definitions for catherine that I've seen before include "-- Parr; -- wheel" , "Great Russian empress" , "Girl's name - kind of wheel" , "Name of three wives of Henry VIII" , "Female" .)