Desert of Mongolia and China (4)
I believe the answer is:
gobi
'desert of mongolia and china' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gobi that I've seen before include "vast arid expanse" , "East Asian desert" , "Asiatic barren plateau which means 'stony desert'" , "Plain" , "Large Far Eastern desert" .)