Looks after the Yorkshire borders (5)
I believe the answer is:
tends
'looks after' is the definition.
(tending is a kind of looking after)
'the yorkshire borders' is the wordplay.
'the yorkshire' becomes 't' (Northern English pronunciation of 'the').
'borders' becomes 'ends' (border can mean something's end or edge).
't'+'ends'='TENDS'
(Other definitions for tends that I've seen before include "Inclines to take care of?" , "Dents (anag.)" , "Inclines or looks after" , "nurses" , "Leans" .)