Possible Clues:

• Abstainer's order
• First person to deal in water (4'1,3)
• Water, humorously
• A mother with opportunity to get bargain non-alcoholic drink
• A US lawyer, male, swallowing drop of salt water
• American blocks beer getting water instead
• A barrier to marketing of water
• Where, perhaps, to buy a barrier for water
• Drink — a sad meal (anag)
• Water, dryly