Do evening work in golf club (4)
I believe the answer is:
iron
This clue is a double definition.
'do evening work' is the first definition.
(to iron is to even out clothing)
'golf club' is the second definition.
(type of golf club)
'in' acts as a link.
(Other definitions for iron that I've seen before include "Metal obtained from haematite" , "uncompromising" , "Smoother - metal" , "Metal (that may be wrought)" , "Magnetic metallic element" .)