The price of entry is a confession (9)
I believe the answer is:
admission
I believe this clue is a double definition.
'the price of entry' is the first definition.
(I've seen this before)
'is a confession' is the second definition.
(I've seen this before)
(Other definitions for admission that I've seen before include "Letting in - letting out" , "Entrance fee" , "The price of entry" , "Right to go in" , "Statement acknowledging the truth of something" .)