Pub fight in northern town (6)
I believe the answer is:
barrow
'northern town' is the definition.
(I've seen this before)
'pub fight' is the wordplay.
'pub' becomes 'bar' (both are drinking establishments).
'fight' becomes 'row' (I've seen this in another clue).
'bar'+'row'='BARROW'
'in' acts as a link.
(Other definitions for barrow that I've seen before include "Cart for the river?" , "Cart for carrying small loads" , "Northern town" , "Handcart; burial mound" , "Cart for one of the three sisters" .)