Scottish landowners (6)
I believe the answer is:
lairds
'scottish landowners' is the definition.
('laird' is a Scottish term for a landowner)
This is the entire clue.
(Other definitions for lairds that I've seen before include "Men of property" , "Members of northern gentry" , "Scots landowners" , "Important northerners" , "wealthy Scots?" .)