Grazing land is beyond river (7)
I believe the answer is:
pasture
'grazing land' is the definition.
(I know that grazing land can be written as pasture)
'beyond river' is the wordplay.
'beyond' becomes 'past' (to go beyond something is to go past it).
'river' becomes 'ure' (river in Yorkshire).
'past'+'ure'='PASTURE'
'is' acts as a link.
(Other definitions for pasture that I've seen before include "Grassland" , "Grass for grazing" , "Stock holder, perhaps" , "Field suitable for grazing" , "Land suitable for grazing" .)