Ground net (4)
I believe the answer is:
land
I believe this clue is a double definition.
'ground' is the first definition.
('land' can be a synonym of 'ground')
'net' is the second definition.
(thesaurus)
(Other definitions for land that I've seen before include "Disembark" , "Country, state" , "Acquire" , "SECOND PART OF 15" , "people" .)