Part, subdivision (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">part</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I have seen 'Distinctive part ' mean 'sector' so perhaps 'part' could also mean 'sector')</span><br/ ><br/ >'<span class="explanation-format__original">subdivision</span>' is the second 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>
(Other definitions for sector that I've seen before include "Corset (anag) - part of a circle" , "Area, division" , "Pie chart slice shape" , "Division or part" , "Escort in zone" .)