Wedge, say, taking divot before a possible splash? (4,4)

I believe the answer is:
club soda
'possible splash?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'wedge say taking divot before a' is the wordplay.
'wedge say' becomes 'club' (wedge is a kind of club).
'taking divot before' becomes 'sod' (I am not sure about this - if you are sure you should believe this answer much more).
'club'+'sod'+'a'='CLUB SODA'
Can you help me to learn more?
(Other definitions for club soda that I've seen before include "Carbonated water (US)" , "Fizzy drink" .)