| SEAFARING | Marine is a force in extreme environment (9) |
| GOBI | Meaning waterless place?, a desert covering parts of China and the country dubbed "Minegolia"; one of the most extreme environments on Earth (4) |
| NAUTICAL | Marine is a lunatic when at sea (8) |
| ULTRA | This marine is a blue (5) |
| FRANCE | Here UN is a force managed by church (6) |
| POWER | Ammunition's stopping ability is a force to be reckoned with (5) |
| WATERFALL | Drop of Adam's ale, a force in the north |
| WEDGE | An object that tapers to a thin edge. Pushing this tool in one direction creates a force in a sideways direction. It is usually made of metal or wood and is used for splitting, lifting, or tightening, |
| EXTEMPORE | Without planning Post Office is in extreme disarray (9) |
| PETRIFIED | Turned to stone - in extreme fear (9) |
| PARTHENON | In extreme pain another designed temple (9) |
| VERBOSITY | 50 bit snaps in extreme case of wordiness (9) |
| EDGECASES | Problems that occur exclusively in extreme situations, and a hint to this puzzle's borders |
| NEEDINESS | State of requiring a great degree of affection and reassurance, while in extreme poverty? |
| HELMHOLTZ | German scientist, forerunner of Siemens, in extreme difficulty with time zones initially |
| BOMBPROOF | Figuratively, safe in extreme conditions |
| SKIRMISH | To indulge in winter sports with a marine is hard, leading to a clash |
| SURINAME | Turns out that US marine is in a South American state (8) |
| ARM | A Royal Marine is out on a limb |
| MAKER | A force in high pressure production? |
