| Clue | Source | Date |
|---|---|---|
| Nickname for Detroit, and a hint for answers to asterisked clues | The Telegraph Cross Atlantic | 11 Oct 2024 |
| Detroit moniker | Eugene Sheffer | 29 Apr 2022 |
| Center of the U.S. auto industry | New York Times | 02 Jun 2019 |
| Center of the U.S. auto industry | ||
| Nickname for Detroit | Newsday | 16 Feb 2016 |
| Detroit nickname |