Simply teach daughter to support golf club cost (5-4)
I believe the answer is:
spoon-feed
'simply teach' is the definition.
(as in spoon-feeding someone information)
'daughter to support golf club cost' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'to support' says to put letters next to each other (in a down clue, some letters hold others up).
'golf club' becomes 'spoon' (historical type of golf club).
'cost' becomes 'fee' (fee is a kind of cost).
'spoon'+'fee'='spoonfee'
'd' put after 'spoonfee' is 'SPOON-FEED'.
(Other definitions for spoon-feed that I've seen before include "Provide with so much help as to remove any challenge" , "Give infant a meal" , "Provide in easy bits" , "Cosset, mollycoddle" , "Foster artificially" .)