List of charges, the result of quarrel crossing a river (6)
I believe the answer is:
tariff
'list of charges' is the definition.
(I've seen this before)
'quarrel crossing a river' is the wordplay.
'quarrel' becomes 'tiff' (tiff is a kind of quarrel).
'crossing' is an insertion indicator.
'river' becomes 'r'.
'a'+'r'='ar'
'tiff' enclosing 'ar' is 'TARIFF'.
'the result of' is the link.
(Other definitions for tariff that I've seen before include "List of fixed charges as in hotel" , "List of duties on imports or exports" , "Import or export duty" , "Duty charge" , "Fees schedule" .)