| INSULATOR | Heat-retaining device developed from solar unit |
| TECH | Devices developed from scientific knowledge (4) |
| CLAMP | Hold onto the metal retaining device |
| ESPRESSO | ___ machine, coffee device developed in Italy in the early 20th century (8) |
| STORMGLASS | Weather forecasting device developed by Admiral Robert FitzRoy and used on his voyage with Charles Darwin on the HMS Beagle |
| ROOFTOP | A white _______ can minimize the amount of heat from solar radiation that is absorbed through roof surfaces of buildings, which can be used to reduce cooling costs and to save energy (7) |
| AGA | A source of heat largely in heat-retaining stove (3) |
| SUNHAT | Protection from solar radiation |
| OZONELAYER | Stratosphere layer that shields Earth from solar radiation |
| SUNBURN | Skin redness from solar exposure |
| SHADED | Before the start of the day, heads could be protected from solar rays (6) |
| TEACOSY | Heat-retaining cover – coat? Yes, possibly |
| THERMOSFLASKS | He's smart, folks, to create heat-retaining vessels (7,6) |
| THERMAL | Heat-retaining articles worn by soldier left behind (7) |
| CLAYMOREMINES | Anti-personnel explosive devices developed by the US named after a Scottish sword (8,5) |
| AGASAGAS | Books in a genre of literature named after a heavy heat-retaining stove (3,5) |
| UNBRITISH | Developed from birth in US, different from US! |
| SCHERZO | From the Italian meaning "I jest", type of music piece developed from the minuet (7) |
| CLAVICHORD | Instrument developed from the medieval monochord that flourished from about 1400 to 1800 and was revived in the 20th century. Rectangular in shape, and its case and lid were usually highly decorated, |
| BRIDGE | Card game for four players that developed from whist (6) |
