Enter a clue or pattern or both:
The Clue
Last poker bet, sometimes (3 letter answer)
The Answer
IOU
Tags
Notes
The answer IOU is seen frequently, appearing about once every 90 puzzles.
Related Clues
Chit
Marker
Cash substitute
Chit in a pot
Debenture, basically
Debt acknowledgment
Debt chit
Debt doc
Debt letters
Debt marker
Debtor's letters
Debtor's note
Gambler's note
Letters of credit?
Letters of debt
Marker letters
Marker, for short
Payment pledge
Promise to pay
Promise of a sort
Promissory note
Slip in a pot
Atl. City marker
Letters from a short person?
Note from one who's shy
Paper in a poker pot
Promise in a poker pot
Unofficial promissory note
Note to be used later
This may incur vigorish
Definition
IOU as a noun:
1. an informal debt instrument; representing `I owe you'