Mongolian desert
I believe the answer is:
'mongolian desert' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gobi that I've seen before include "The . . . . Desert is a barren plateau of S Mongolia and N China" , "Desert in central Asia" , "Mongolian/Chinese desert" , "Desert of central China" , "Asian desert region" .)