Oratory in the case of Churchill hard to copy (6)
I believe the answer is:
chapel
'oratory' is the definition.
(thesaurus)
'in the case of churchill hard to copy' is the wordplay.
'in the' is an insertion indicator.
'case of' means to remove the middle letters (outsides of).
'hard' becomes 'h'.
'to copy' becomes 'ape' ('ape' can be a synonym of 'copy').
'churchill' with its centre removed is 'cl'.
'h'+'ape'='hape'
'cl' going around 'hape' is 'CHAPEL'.
(Other definitions for chapel that I've seen before include "Place of worship set apart in church or cathedral" , "Place of worship with an altar" , "NUJ members?" , "house of prayer" , "Local printers" .)