Shortly advise dairy product (4)
I believe the answer is:
brie
'dairy product' is the definition.
(Brie is an example)
'shortly advise' is the wordplay.
'shortly' means to remove the last letter.
'advise' becomes 'brief'.
'brief' with its last letter taken off is 'BRIE'.
(Other definitions for brie that I've seen before include "Prov. squalid place" , "Round soft Fr. cheese" , "Soft and creamy mild white cheese" , "cheese-producing region" , "Soft, creamy French cheese" .)