Deep involvement in baptism (9)
I believe the answer is:
immersion
This clue could be a double definition.
'deep involvement' is the first definition.
'immersion' can be an answer for 'involvement' (thesaurus). I'm unsure of the 'deep' bit.
'baptism' is the second definition.
(I know that immersion is a type of baptism)
'in' is the link.
Can you help me to learn more?
(Other definitions for immersion that I've seen before include "dip" , "Deep absorption (in a subject)" , "Deep absorption; baptism" , "Baptism; deep involvement" .)