| CHUCKYEAGER | U.S. pilot who was the first person confirmed to fly faster than the speed of sound (5,6) |
| YEAGER | US test pilot who was the first person to break the sound barrier (6) |
| BRIDGEOFSPIES | 2015 film starring Tom Hanks which is about a lawyer who negotiates the release of a U.S. pilot in exchange for a Soviet KGB agent: 3 wds. |
| OXTAILSOUP | Bovine type, a U.S. pilot, spilt liquid fuel (6,4) |
| SONICBOOM | Sound created when an object travels through the air faster than the speed of sound (5,4) |
| MARIESTOPES | Which Scottish birth-control campaigner was the first person to discover a petrified flower? (5,6) |
| FOURMINUTES | Roger Bannister was the first person to run a mile under this time (2 wds.) |
| SUBSPACE | In science fiction, a hypothetical method of communication which is faster than the speed of light (8) |
| TACHYON | Hypothetical particle postulated to travel faster than the speed of light |
| SUPERSONIC | Faster than the speed of sound |
| OVERSEE | Run faster than the speed of light, we hear |
| KNOXJOHNSTON | Surname of the British sailor who was the first person to perform a single-handed, nonstop circumnavigation of the globe (4-8) |
| RICHARD | ___ Rodgers composer with works like Oklahoma!' and The Sound of Music who was the first person to win the EGOT |
| SUBSONIC | Describing aircraft that typically fly at less than the speed of sound (8) |
| NYAD | Diana who was the first person to swim from Cuba to Florida without the aid of shark protection (2013) |
| CHARLES | In about 1840, which naturalist was the first person to add wheeled legs to a chair, the precursor of the modern office chair? (7,6) |
| DARWIN | In about 1840, which naturalist was the first person to add wheeled legs to a chair, the precursor of the modern office chair? (7,6) |
| MACHO | Virile, but considerably less than the speed of sound (5) |
| COOPER | Which boxer was the first person to win the BBC Sports Personality of the Year Award twice? (6) |
| BLERIOT | French aviator and inventor who was the first person to fly the English Channel, in 1909 (7) |
