Region south of the Sahara (5)
I believe the answer is:
sahel
'region south of the sahara' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sahel that I've seen before include "Semi-arid region of West Africa" , "African belt" , "heals wound" , "Region to south of Sahara desert" .)