Visiting pub, overheard barristers (5,3)
I believe the answer is:
inner bar
'visiting' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'pub overheard barristers' is the wordplay.
'pub' becomes 'inn' (an inn is a type of pub).
'overheard' becomes 'er' (I can't justify this - if you can you should give a lot more credence to this answer).
'barristers' becomes 'bar' (the bar can mean the legal profession).
'inn'+'er'+'bar'='INNER BAR'
Can you help me to learn more?
(Another definition for inner bar that I've seen is " Queen's or King's Counsel collectively".)