Make known part of speech in a new church (8)
I believe the answer is:
announce
'make known' is the definition.
('announce' can be a synonym of 'make known')
'part of speech in a new church' is the wordplay.
'part of speech' becomes 'noun' (noun is a kind of part of speech).
'in' is an insertion indicator.
'a new' becomes 'an' (I've seen this in other clues).
'church' becomes 'ce' (abbreviation for Church of England).
'an'+'ce'='ance'
'noun' inserted into 'ance' is 'ANNOUNCE'.
(Other definitions for announce that I've seen before include "Disclose" , "Tell everyone" , "Make known publicly or to an audience" , "Declare her weight" , "Declare publicly" .)