Possible Clues:

• Took a hit
• Tipped at the casino
• Took a legal puff, in some states
• Tipped, as a dealer
• Puffed, as a reefer
• Used a product from a 15-Across, say
• ___ up (got high)
• Puffed, as a joint
• Took a hit, in a way
• Puffed, illegally