Related Clues:

• Put in a stake
• Said 'I'm in,' in effect
• Paid to play
• Paid for a hand
• Fed the kitty
• Pitched in, and got a hand
• Paid to stay in
• Started the pot
• Paid to be in
• Ponied up for a hand
• Chipped in a chip
• Made a larger pot?
• Asked for a hand?
• Chose to play
• Kicked in