| Clue | Source | Date |
|---|---|---|
| In a spiral pattern (7) | ||
| Like all fingerprints | Universal | 22 Jan 2017 |
| Like all fingerprints | ||
| Fingerprint-shaped | USA Today | 09 Jul 2016 |
| Fingerprint-shaped | ||
| Like fingerprints | ||
| Like fingerprints | ||
| Spiral-shaped | ||
| Like fingerprints | ||
| Verticillate | ||
| Designed like a fingerprint | ||
| Like fingerprints |