Pub argument which carries weight (6)
I believe the answer is:
barrow
'carries weight' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'pub argument' is the wordplay.
'pub' becomes 'bar' (both are drinking establishments).
'argument' becomes 'row' (to row is to argue).
'bar'+'row'='BARROW'
'which' is the link.
Can you help me to learn more?
(Other definitions for barrow that I've seen before include "Cart; tumulus" , "Load-carrying cart - burial mound" , "Grave mound - wheeled handcart" , "Small cart for a prehistoric burial mound" , "Cart for the river?" .)