Part of church in deterioration's uplifted (6)
I believe the answer is:
sector
'part' is the definition.
(I have seen 'Distinctive part ' mean 'sector' so perhaps 'part' could also mean 'sector')
'church in deterioration's uplifted' is the wordplay.
'church' becomes 'CE' (Church of England).
'in' is an insertion indicator.
'deterioration's' becomes 'rot's'.
'uplifted' says the letters should be written backwards.
'ce' going into 'rots' is 'rotces'.
'rotces' back-to-front is 'SECTOR'.
'of' acts as a link.
(Other definitions for sector that I've seen before include "A body of people who form part of society or economy" , "Area of circle between two radii" , "District" , "Area covered by corset" , "Part of circle between radii" .)