Where the Himalayas are (4)
I believe the answer is:
asia
'where the himalayas are' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for asia that I've seen before include "A great deal of land" , "It has most of the earth's population" , "A vast number of people have lived here" , "The nations of the East, collectively" , "One-third of all land" .)