Access to confession (9)
I believe the answer is:
admission
This clue is a double definition.
'access' is the first definition.
(I know that access can be written as admission)
'confession' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for admission that I've seen before include "Permission to enter" , "concession" , "Letting in - letting out" , "acceptance" , "entry charge" .)