Possible Clues:

• A judge's rooms
• Po-faced lexicography here?
• Where judges may study the elements of sentencing?
• Rooms for the judge
• Rooms in which honoured person is entertained by cleaners
• Judge's rooms
• A judge's room
• Hard to enter bank's vaults
• Dictionary in the Inns of Court
• Where to find definition of 'atria'?