Milk source (5)
'milk source' is the definition.
(building which processes cow's milk)
This is the entire clue.
(Other definitions for dairy that I've seen before include "Milk processing plant" , "Type of farm" , "Place for storing milk products" , "Business supplying milk etc" , "Creamery" .)
'milk source' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for udder that I've seen before include "Teat of a cow" , "Natural container for milk?" , "Mammary gland of cows, sheep etc" , "What's at rear on cows" , "Animal mammary gland" .)