| 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 |
| UNBRITISH | Developed from birth in US, different from US! |
| BOBSLEIGH | Racing sled developed from bilge? Bosh! (9) |
| IDENTICAL | Referring to twins of the same gender who developed from a single ovum that split into two (9) |
| CROISSANT | Sweet flaky French pastry purportedly developed from the Austrian kipferl or Hungarian kifli (9) |
| FLIPFLOPS | Footwear developed from the Japanese zori, which became popular after World War II (4-5) |
| 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) |
