Disagreement at pub related to small cart (6)
I believe the answer is:
barrow
'cart' is the definition.
(barrow is a kind of cart)
'disagreement at pub' is the wordplay.
'disagreement' becomes 'row' (row is a kind of disagreement).
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'pub' becomes 'bar' (both are drinking establishments).
'row' after 'bar' is 'BARROW'.
'related to small' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for barrow that I've seen before include "Load-carrying cart - burial mound" , "old burial ground" , "Cumbrian town" , "Northern town" , "Cart; grave mound" .)