Desert region has near waters diverted (7,6)
I believe the answer is:
western sahara
'desert region' is the definition.
(part of the Sahara desert)
'has near waters diverted' is the wordplay.
'diverted' indicates an anagram (each letter get diverted elsewhere).
'has'+'near'+'waters'='hasnearwaters'
'hasnearwaters' is an anagram of 'WESTERN SAHARA'.
(Other definitions for western sahara that I've seen before include "Disputed area in Africa" , "territory" .)