Public not allowed (3)
I believe the answer is:
out
This clue is a double definition.
'public' is the first definition.
(out can mean released to the public)
'not allowed' is the second definition.
(I've seen this before)
(Other definitions for out that I've seen before include "Elsewhere -- unfashionable" , "For example, caught" , "Not in fashion" , "Not favoured" , "Old hat" .)