Superiority of golf club without tungsten (4)
I believe the answer is:
edge
'superiority' is the definition.
(I know that edge is a type of superiority)
'golf club without tungsten' is the wordplay.
'golf club' becomes 'wedge' (type of golf club).
'without' indicates named letters should be taken away.
'tungsten' becomes 'W' (W is the chemical symbol for tungsten).
'wedge' with 'w' taken away is 'EDGE'.
'of' is the link.
(Other definitions for edge that I've seen before include "Sharp side of a blade" , "Guitarist with U2" , "Advantage (informal)" , "Intense quality; limit" , "Margin, fringe" .)