Part of France's established church (8)

I believe the answer is:

provence

'part of france's' is the definition.
('Provence' is part of 'france')

'established church' is the wordplay.
'established' becomes 'proven' (similar in meaning).
'church' becomes 'CE' (abbreviation for Church of England).
'proven'+'ce'='PROVENCE'

(Other definitions for provence that I've seen before include "somewhere in France" , "Never cop this French region" , "part of France" , "Area of SE France" , "Even crop is badly produced in France" .)

I've seen this clue in The Guardian.

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