Related Clues:

• The 'a' in a.m.
• Chip on the table, maybe
• A couple of chips in the pot, maybe
• Dealer's request, perhaps
• Add to the pot
• Show that one's in?
• Up the pot
• Prelude to a deal, perhaps
• Get in a hand
• Gambler's stake
• No one's in until this is put in
• Indication of serious intent
• It goes in the middle of the table
• A couple of chips in the pot, say
• Poker penny