| Clue | Source | Date |
|---|---|---|
| Worried about small vessels | The Times Cryptic | 22 Jan 2024 |
| German wartime submarines | The Times Concise | 08 Nov 2023 |
| Warcraft from America's leader, but so refined | ||
| So, a tub can be made into a submarine | ||
| Threats once to a sub at sea | ||
| They're fitted to a sub! |