A big-headed club (6)
I believe the answer is:
driver
'a big-headed club' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for driver that I've seen before include "Motorist - golf club" , "See 1 down" , "Flat-faced golf club" , "Member of RAC" , "chauffeuse" .)