Motorist in golf club (6)
I believe the answer is:
driver
I believe this is a double definition.
'motorist' is the first definition.
(I've seen this before)
'golf club' is the second definition.
(I know that driver is a type of wood)
'in' is the link.
(Other definitions for driver that I've seen before include "Operator of a motor vehicle" , "See 1 down" , "Motorist - golf club" , "Type of golf club" , "Flat-faced golf club" .)