| Clue | Source | Date |
|---|---|---|
| Sweet enthusiast collars American in charge of flying | The Telegraph Toughie | 16 Nov 2018 |
| Pertaining to the science of air travel | The Times Specialist Sunday | 21 Jan 2018 |
| Notice aura issuing out of plane navigation | ||
| Concerning aircraft | ||
| Pertaining to an important science. |