| Clue | Source | Date |
|---|---|---|
| U.N. aviation agency, abbr. | ||
| UN flight-related agcy. headquartered in Montreal | ||
| International Civil Aviation Organization | The Telegraph Cross Atlantic | 01 May 2025 |
| Air traffic control body | ||
| International Civil Aviation Organization | The Telegraph Cross Atlantic | 17 Oct 2024 |
| International Civil Aviation Organization | The Telegraph Cross Atlantic | 24 Sep 2024 |
| Aviation agency | ||
| Body for international civil aviation (abbr.) | The Telegraph Cross Atlantic | 18 Jul 2024 |
| U.N. agency |