Does it give dairy farmer easy profits? (4,3)
I believe the answer is:
cash cow
'profits?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
I don't understand the rest of the clue.
(Other definitions for cash cow that I've seen before include "Money-spinning business" , "source of lucre" , "Saw choc (anag.); steady investment" , "Business making large profits" , "Something providing a steady income or profit" .)