| Answer | Crossword Clue |
|---|---|
| RSVP | "Let me know," on invitations |
| RSVP | "Let me know," on an invitation |
| SLEEPONIT | "Let me know tomorrow" |
| RSVP | "Let me know" letters |
| ICAN | "Let me know if ... help" |
| RSVP | "Let me know if you're coming" letters |
| THIS | Huey Lewis "If ... is it, please let me know" |
