Language in church in dispute (5)
I believe the answer is:
hindi
'language' is the definition.
(Hindi is an example)
'in church in dispute' is the wordplay.
'in' indicates the answer is hidden within the clue.
'HINDI' is hidden in the letters of 'church in dispute'.
(Other definitions for hindi that I've seen before include "Language derived from Sanskrit" , "Asian language" , "An official language of India" , "Language of northern India" , "One of India's official languages" .)