Confession being task of Christian era? (9)
I believe the answer is:
admission
'confession' is the definition.
(I've seen this before)
'task of christian era?' is the wordplay.
I cannot quite understand how this works, but
'task' could be 'mission' (I've seen this before) and 'mission' is located in the answer.
The remaining letters 'ad' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
'being' acts as a link.
Can you help me to learn more?
(Other definitions for admission that I've seen before include "The price of entry" , "Anything conceded" , "Entree" , "entry charge" , "Right to go in" .)