Related Clues:

• It offers a broad tip to writer - result in exam brings about setback
• Hole note?
• Outstanding indication
• Bettor's marker
• Payment-to-come-later note
• "Bill me later" note
• Reminder to repay
• Letters from a poor gambler
• Note from a short person?
• All-vowel vow
• Offers a broad tip to writer who tends to have a defensive approach
• Note to a creditor
• Indication of being short, for short
• Promise of a future payment
• Shy person's note?