Sod; territory (4)
I believe the answer is:
turf
I believe this clue is a double definition.
'sod' is the first definition.
(I know that sod can be written as turf)
'territory' is the second definition.
(I know that turf is a type of city district)
(Other definitions for turf that I've seen before include "Gang's territory" , "Slab for lawn" , "Gang territory" , "Layer of matted earth and grass" , "Horse racing, generally" .)