Possible Clues:

• Full eighteen holes consumes some time
• Bar contains cask of stout
• 'This a place you're sure to find a berth in, by the sound of it (6)'
• Round around a round T
• Staff quaffing barrel of beer - stout
• Like Nero Wolfe
• It's round around the capital of Turkey
• Portly about fatty's middle?
• Fat tenor in 'The Ring'
• Do turn around here