We do turn out after all - it's not forbidden (7)
I believe the answer is:
allowed
'not forbidden' is the definition.
('allow' is the opposite to 'forbid')
'we do turn out after all' is the wordplay.
'turn out' indicates anagramming the letters.
'after' is a charade indicator (letters next to each other).
'we'+'do'='wedo'
'wedo' with letters rearranged gives 'owed'.
'owed' put after 'all' is 'ALLOWED'.
'it's' is the link.
(Other definitions for allowed that I've seen before include "Given the chance" , "Owned" , "Permitted and granted" , "Acknowledged" , "permissible" .)