Possible Clues:

• Anheuser-Busch is one
• One makes ale in jug after bar emptied
• Might one make you bitter?
• Who can fill an empty beer jug?
• One producing beer outside of Renfrew in new way?
• Producer of empty beer vessel? No!
• Yalta is out of barley water produced by a stout man?
• Empty beer jug? Guinness, maybe, required
• Barley regularly ends in new ale and beer for him?
• Little brown jug for Guinness, say