| Clue | Source | Date |
|---|---|---|
| Looked past | ||
| Disregarded some fun (not educational) | ||
| Not recognised | The Times Concise | 25 Sep 2015 |
| Overlooked | ||
| Overlooked | ||
| Overlooked | ||
| Not accounted for | ||
| Obscure | ||
| Overlooked | ||
| Not seen | ||
| Obscure. | ||
| Insignificant. | ||
| Not recorded. | ||
| Not observed. | ||
| Overlooked |