Related Clues:
- Waiter's bonus
- Helpful hint
- Good thing that comes to those who wait?
- Money on the table, maybe
- Part of an iceberg
- Detective's lead
- Iceberg part
- 15%-20%, usually
- Help line?
- Part of a pointer
- It's left on the table
- Subject of an anonymous call, maybe
- Service bonus
- Bit of help
- Part of an iceberg that's visible