Cambodia's continent (4)
I believe the answer is:
asia
'cambodia's continent' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for asia that I've seen before include "group of countries" , "Thailand and its location" , "It has most of the earth's population" , "Continent bordering three oceans" , "Heavily populated area" .)