Sheltered by Christian, I get into trouble (3,2)
I believe the answer is:
cop it
'get into trouble' is the definition.
(to cop it is to receive punishment)
'sheltered by christian i' is the wordplay.
I cannot really understand how this works, but
'i' is found in the answer.
'christian' could be 'copt' (member of the Coptic Church, a Christian church) and 'copt' is found within the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for cop it that I've seen before include ""get in loads of trouble!"" , "Be punished" , "Get into trouble; be killed" , "Get it in the neck" , "Suffer the consequences!" .)