A right squabble about the price list (6)
I believe the answer is:
tariff
'price list' is the definition.
(I've seen this before)
'a right squabble about' is the wordplay.
'right' becomes 'r' (common abbreviation).
'squabble' becomes 'tiff' (synonyms).
'about' is an insertion indicator.
'a'+'r'='ar'
'ar' put into 'tiff' is 'TARIFF'.
'the' acts as a link.
(Other definitions for tariff that I've seen before include "List of prices displayed as in pub" , "Sentencing scale" , "Table of fixed charges" , "Table of (hotel) charges" , "List of customs duties" .)