Lard is produced for Scottish land-owners (6)
I believe the answer is:
lairds
'scottish land-owners' is the definition.
(I've seen this before)
'lard is produced' is the wordplay.
'produced' indicates an anagram.
'lard'+'is'='lardis'
'lardis' anagrammed gives 'LAIRDS'.
'for' is the link.
(Other definitions for lairds that I've seen before include "Men of property" , "Scottish landowners (6)" , "Scots landowners" , "Important northerners" , "Members of northern gentry" .)