For an audience poet not allowed in pub (6)
I believe the answer is:
barred
'not allowed in pub' is the definition.
I can't judge whether this definition defines the answer.
'for an audience poet' is the wordplay.
'for an audience' indicates a 'sounds like' (homophone) clue (as the word might sound to an audience).
'poet' becomes 'bard' (bard is a kind of poet).
'bard' is a homophone of 'BARRED'.
Can you help me to learn more?
(Other definitions for barred that I've seen before include "Precluded, obstructed" , "Refused access to, say pub" , "Prohibited" , "Wouldn't allow" , "Excluded, blocked" .)