| 100% | ABLE | 4 | "Let us know if you'll be ___ to attend" |
| 78% | ABLE | 4 | "Let us know if you're ___ to attend" |
| 64% | RSVP | 4 | “Let us know if you’re attending” letters |
| 62% | RSVP | 4 | "Please let us know if you're coming" letters |
| 62% | RSVP | 4 | "Please let us know if you're coming" abbreviation |
| 56% | RSVP | 4 | "Let us know if you're coming" initials |
| 56% | RSVP | 4 | "Let us know if you're coming" letters |
| 56% | RSVP | 4 | "Let us know if you're coming": Abbr. |
| 53% | SEER | 4 | If you were one, you'd already know the answer to this clue |
| 52% | WAY | 3 | *Did you know that if the Milky ___ Galaxy were condensed to the size of the U.S., 7d would be smaller than a grain of rice? |
| 50% | ESTATELAW | 9 | Important thing to know, if you will |
| 48% | RSVPED | 6 | Let someone know if you can go |
| 48% | WHITE | 5 | *Did you know, ___ Castle is the first US-based fast-food chain to sell 40a? |
| 44% | AIM | 3 | ____ High, if you want to be successful |
| 43% | UNCERTAIN | 9 | If you know or decide, then you can't be this |
| 43% | HED | 3 | "___ let us in, knows where we've been" (Beatles lyric) |
| 43% | CANWEGO | 7 | "Will you allow us to attend?": 3 wds. |
| 43% | TBA | 3 | "We'll let you know later" |
| 43% | ILL | 3 | "___ have to let you know" |
| 43% | SPIN | 4 | "Did you know, we can ___ 1a to tell if it's raw or boiled?" |
| 43% | KNEW | 4 | "I'll spend forever wondering if you ___ / I was enchanted to meet you" |
| 43% | HIPSTER | 7 | If you claim to be one, you probably aren't really one |
| 42% | TBA | 3 | "We'll let you know," on skeds |
| 42% | TBA | 3 | "We'll let you know later" letters |
| 42% | RSVP | 4 | "Let me know if you're coming" |
| 42% | ABLE | 4 | "Will you be ___ to join us?" |
| 42% | HED | 3 | “___ let us in, knows where we’ve been” (“Octopus’s Garden” lyric) |
| 42% | RSVP | 4 | "Let me know if you're coming" letters |
| 42% | RSVP | 4 | "Let me know if you're coming" initials |
| 42% | ABLE | 4 | "Would you be ___ to join us?" |