Leading spinner (3)
I believe the answer is:
top
This clue is a double definition.
'leading' is the first definition.
(both can mean first-class)
'spinner' is the second definition.
(a spinning top)
(Other definitions for top that I've seen before include "Highest part" , "Children's toy" , "The upper part" , "Uppermost part" , "Toy; garment" .)