Club that spurs one on (6)
I believe the answer is:
driver
I believe this clue is a double definition.
'club' is the first definition.
(type of golf club)
'that spurs one on' is the second definition.
(something that drives you on)
(Other definitions for driver that I've seen before include "Motorist - golf club" , "Operator of a motor vehicle" , "Flat-faced golf club" , "Type of golf club" , "Golf-club for a motorist" .)