Abandon in the Gobi, say (6)
I believe the answer is:
desert
I believe this clue is a double definition.
'abandon' is the first definition.
(desert can mean to leave or abandon)
'the gobi say' is the second definition.
(gobi is a kind of desert)
'in' is the link.
(Other definitions for desert that I've seen before include "barren tract" , "Abscond from forces" , "Run away; desolate area" , "Abandon in wasteland" , "ditch" .)