Nile Valley country (5)
I believe the answer is:
egypt
'nile valley country' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for egypt that I've seen before include "North African state" , "Land of the lower Nile" , "Land of the pharaohs" , "Cleopatra's country" , "Cleopatra its queen" .)