Line from fox or rabbit argument (6)
I believe the answer is:
furrow
'line' is the definition.
(synonyms)
'fox or rabbit argument' is the wordplay.
'fox or rabbit' becomes 'fur' (fox or rabbit fur might be used to make a garment).
'argument' becomes 'row' (to row is to argue).
'fur'+'row'='FURROW'
'from' acts as a link.
(Other definitions for furrow that I've seen before include "Long cut in ground made by plough" , "Plough's rut" , "A long groove or deep wrinkle" , "Ploughing mark" , "Wrinkle (brow)" .)