Related Clues:

• It may be tapped out
• Boilermaker part
• Pub staple
• Brewery output
• Shampoo ingredient, sometimes
• Schooner fill
• Drink with a head
• Shampoo type
• 'Cheers' order
• Coors product
• Major German export
• Libation station potation
• Duff, on "The Simpsons"
• The 'one' in the phrase 'draw one'
• Mug filler