Shortened county borders (4)
I believe the answer is:
beds
I believe this clue is a double definition.
'shortened county' is the first definition.
(I've seen this before)
'borders' is the second definition.
(I've seen this before)
(Other definitions for beds that I've seen before include "to which people may retire" , "Pieces of furniture" , "Garden plots -- English country (abbr)" , "Place" , "County (abbr.); sleeping places" .)