Ancient Nile region (5)
I believe the answer is:
nubia
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ancient nile region</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nubia that I've seen before include "Region of northeast Africa" , "Ancient Nile region" , "Ancient African country in Egypt and Sudan" , "Upper 16 Across region" , "African kingdom" .)