Districts (5)
'districts' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for areas that I've seen before include "Spaces covered by two-dimensional surfaces" , "Localities" , "Zones" , "Geographical regions" , "Places" .)
(Other definitions for sectors that I've seen before include "Branches of enterprise" , "Divisions of a nation's economic operations" , "mathematical instruments" .)