Possible Clues:

• Gangster and policeman work together — and drink
• Drink with a large policeman before work
• Officer in police operation undercuts Capone, offering diluted booze
• Pee in chain store after a large drink
• Drink cola mixed by old man
• Teenage alcoholic drink
• Missing first dance, policeman comes in for a drink
• Something going to the head local cop, opponent claims
• Not-so-soft drink, sort of cola, given to Dad
• A large supermarket stores soft drink