Leave the Sahara? (6)
I believe the answer is:
desert
I believe this clue is a double definition.
'leave' is the first definition.
(desert can mean to leave or abandon)
'sahara?' is the second definition.
(sahara is a kind of desert)
'the' acts as a link.
(Other definitions for desert that I've seen before include "Defect, forsake" , "part of Africa?" , "Abandon - wilderness" , "Abandon in arid area" , "Merit < leave" .)