Subdivision; quarter (6)
I believe the answer is:
sector
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">subdivision</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I have seen 'Subdivision of area ' mean 'sector' so perhaps 'subdivision' could also mean 'sector')</span><br/ ><br/ >'<span class="explanation-format__original">quarter</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for sector that I've seen before include "Area of circle between two radii" , "Area, division" , "Part of a pie chart" , "battle zone" , "Area covered by corset" .)