| Clue | Source | Date |
|---|---|---|
| Clever ones | Newsday | 01 Apr 2021 |
| '... ___: Because you deserve treats for driving our fuel-efficient vehicles' | The Washington Post Sunday | 26 Aug 2018 |
| Clever folks | Eugene Sheffer | 25 Jan 2016 |
| Baked goods for geniuses? | ||
| Sharpies | ||
| They're sharp |