The East, to the West (4)
I believe the answer is:
asia
I believe this clue is a double definition.
'the east' is the first definition.
(I've seen this in another clue)
'to the west' is the second definition.
(thesaurus)
(Other definitions for asia that I've seen before include "Huge landmass" , "Stretch of land" , "A great deal of land" , "A vast number of people have lived here" , "Major land mass" .)