Choir ceased working in province (11)
I believe the answer is:
archdiocese
'province' is the definition.
(thesaurus)
'choir ceased working' is the wordplay.
'working' is an anagram indicator.
'choir'+'ceased'='choirceased'
'choirceased' anagrammed gives 'ARCHDIOCESE'.
'in' is the link.
(Other definitions for archdiocese that I've seen before include "York, say" , "York, for example" , "Important church area" , "eg York" .)