A striking dairy product (6)
I believe the answer is:
butter
'dairy product' is the definition.
(butter is a kind of dairy product)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for butter that I've seen before include "Bread-spread made from milk" , "Spread derived from cream" , "& 22 Mincepie accompaniment" , "Dairy spread" , "goat?" .)