Following son in church (5)
I believe the answer is:
since
'following' is the definition.
(thesaurus)
'son in church' is the wordplay.
'son' becomes 's'.
'church' becomes 'ce' (abbreviation for Church of England).
's'+'in'+'ce'='SINCE'
(Other definitions for since that I've seen before include "Seeing that" , "From that time one" , "in the past" , "Because; ago" .)