Destined to be admitted to the church (8)
I believe the answer is:
ordained
'destined' is the definition.
(thesaurus)
'admitted to the church' is the wordplay.
I cannot quite understand how this works, but
'admitted' could be 'in' (eg someone might be admitted into a group) and 'in' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'to be' is the link.
Can you help me to learn more?
(Other definitions for ordained that I've seen before include "Conferred holy orders on" , "Elevated to the priesthood" , "Like a priest" , "Laid down the law" , "Invested with priestly authority" .)