About to get in a fight for the goods (7)
I believe the answer is:
freight
'goods' is the definition.
(freight is a kind of goods)
'about to get in a fight' is the wordplay.
'about to get' becomes 're' (I've seen this in other clues).
'in' is an insertion indicator.
're' placed into 'fight' is 'FREIGHT'.
'for the' acts as a link.
(Other definitions for freight that I've seen before include "that's carried by rail and road" , "Goods carried by a large vehicle" , "Something carried" , "Goods carries by large vehicle" , "Consignment" .)