Golf club giving Woods, initially, slight advantage (5)
I believe the answer is:
wedge
'golf club' is the definition.
(I've seen this before)
'giving woods initially slight advantage' is the wordplay.
'giving' is a charade indicator (letters next to each other).
'initially' indicates taking the first letters.
'slight advantage' becomes 'edge' (I've seen this before).
The initial letter of 'woods' is 'w'.
'w' put next to 'edge' is 'WEDGE'.
(Other definitions for wedge that I've seen before include "Tapered insert" , "Type of shoe" , "A golf club; divisive idea" , "Piece of wood thick at one end, thin at other" , "Lofted club" .)