Brought up unprocessed berries I lost during acrimonious dispute (4,3)
I believe the answer is:
turf war
'dispute' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for turf war that I've seen before include "contest in which gangs participate?" , "territorial dispute" , "Serious horse racing" , "local dispute" , "Dispute over territory between rival gangs" .)