Church increased time being consumed to baptise (8)
I believe the answer is:
christen
'baptise' is the definition.
('christen' can be a synonym of 'baptise')
'church increased time being consumed' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'increased' becomes 'risen' (rising is a kind of increasing).
'time' becomes 't'.
'being consumed' means one lot of letters goes inside another.
'risen' going around 't' is 'risten'.
'ch'+'risten'='CHRISTEN'
'to' is the link.
(Other definitions for christen that I've seen before include "Use for the first time" , "Name in church" , "Baptise and name" , "attach handle to" , "Baptize" .)