| HEATSEEKING | Able to detect and home in on infrared radiation (of a missile) (4-7) |
| BASES | First, second, third, and home, in softball |
| TYNDALL | John __, 19th century Irish physicist known for his work on infrared radiation (7) |
| NOSECONE | Spacecraft leader able to detect the smell of pine? (4-4) |
| SENSITIVE | Able to detect the small movements etc. (9) |
| MINESWEEPER | Ship equipped to detect and clear explosives (11) |
| AUTOCORRECT | Smartphone texting feature, which usually detects and fixes the thing hidden in 17-, 24- and 47-Acro |
| ULTRAVIOLET | Radiation of wavelengths shorter than visible light |
| RADAR | Measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locat |
| RADARS | Measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects (plural) |
| BURGLARALARM | Device to detect and warn of a break-in (7,5) |
| PROOFREAD | To check copy in order to detect and mark errors to be corrected (9) |
| SONAR | Asdic used to detect and locate objects by means of this system (5) |
| CARBON | Mosquitoes use exhaled ___ dioxide, body odours,temperature, and movement to home in on their victims |
| THEMANINTHEMOON | Refers to familiar-looking features on orbiting object that men home in on, excitedly |
| GREENHOUSE | A ___ gas is any gas that has the property of absorbing infrared radiation (net heat energy) emitted from Earth's surface and reradiating it back to Earth's surface. |
| VAMPIREBAT | Nocturnal mammal which uses infrared radiation to locate blood hotspots on its prey (7,3) |
| GEIGERCOUNTER | Instrument used to detect and measure radioactivity (6,7) |
| PINPOINT | Home in on a source of pain (8) |
| XRAY | Electromagnetic radiation of extremely short wavelength and capable of penetrating solids (1-3) |
