Central area of a country or region (8)
I believe the answer is:
interior
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">central area of a country</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">region</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(interior is a kind of region)</span><br/ ><br/ ></span>
(Other definitions for interior that I've seen before include "Domestic" , "sort of design for its > minister?" , "Inner part" , "The area inside" , "Inland region" .)