Owned up and let in (8)
I believe the answer is:
admitted
This clue is a double definition.
'owned up' is the first definition.
(I've seen this before)
'let in' is the second definition.
(I've seen this before)
'and' acts as a link.
(Other definitions for admitted that I've seen before include "income?" , "Allowed to enter or owned up" , "being given access" , "Allowed in or accepted as true" , "Acknowledged to be true" .)