Learned group reduced fat with regular servings of roast pig (8)
I believe the answer is:
literati
'learned' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for literati that I've seen before include "Bookish types" , "intellectuals" , "Learned, well-read people" , "Well-read types" , "The intelligentsia interested in writing and reading" .)