Message about church is creating ruptures (7)
I believe the answer is:
schisms
'ruptures' is the definition.
(I know this)
'message about church is' is the wordplay.
'message' becomes 'SMS' (Short Message Service, text messaging).
'about' indicates putting letters inside.
'church' becomes 'ch' (common abbreviation).
'ch'+'is'='chis'
'sms' enclosing 'chis' is 'SCHISMS'.
'creating' acts as a link.
(Other definitions for schisms that I've seen before include "Breaches in churches" , "Breaches in the church" , "Religious disunities" .)