Bird allowed to go round the pub (6)
I believe the answer is:
linnet
'bird' is the definition.
(linnet is a kind of bird)
'allowed to go round the pub' is the wordplay.
'allowed' becomes 'let' (I've seen this before).
'to go round' indicates putting letters inside.
'the pub' becomes 'inn' (I've seen this before).
'let' going around 'inn' is 'LINNET'.
(Other definitions for linnet that I've seen before include "Brown-gray kind of finch" , "Common finch" , "North London terminus" , "Passerine bird" , "House finch" .)