Protestant is delighted in German article (9)
I believe the answer is:
dissenter
'protestant' is the definition.
(thesaurus)
'is delighted in german article' is the wordplay.
'delighted' becomes 'sent' (I've seen this in another clue).
'in' indicates putting letters inside.
'german article' becomes 'der' (definite article in German).
'is'+'sent'='issent'
'issent' inserted into 'der' is 'DISSENTER'.
(Other definitions for dissenter that I've seen before include "Nonconformist" , "One who differs among residents" , "one not C of E" , "As protester" , "A non-orthodox" .)