Dairy product provided by a goat (6)
I believe the answer is:
butter
I believe this clue is a double definition.
'dairy product' is the first definition.
(butter is a kind of dairy product)
'a goat' is the second definition.
(something which 'butts')
'provided by' acts as a link.
(Other definitions for butter that I've seen before include "Spread for bread" , "Spread derived from cream" , "Process of instruction" , "Edible fat" , "Solid fat churned from milk" .)