Court decision offering only opening for club (4)
I believe the answer is:
wood
'only opening for club' is the definition.
'wood' can be an answer for 'club' (wood is a kind of club). I'm not sure about the 'only opening for' bit.
'court decision' is the wordplay.
'court' becomes 'woo' (both can mean to romance someone).
'decision' becomes 'd' (this could be a standard abbreviation which I don't know about).
'woo'+'d'='WOOD'
'offering' acts as a link.
Can you help me to learn more?
(Other definitions for wood that I've seen before include "What you might need to play golf" , "Old conductor" , "Forest - golf club - biased bowl" , "Wind instrument - golf club" , "celebrated conductor" .)