Neighbor of Sudan (4)
I believe the answer is:
chad
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">neighbor of sudan</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for chad that I've seen before include "African republic; punched bits" , "Small piece that's removed when a hole is punched, in a card say" , "article put out by Punch?" , "hanging has helped elect president?" , "N.Central African Republic" .)