| ALTOHORN | Brass instrument pitched in E flat developed in the 1840s by the Belgian instrument maker Adolphe Sa |
| HARMONIUM | Keyboard instrument developed in the 1840s by the French inventor Alexandre Debain (9) |
| BASSTUBA | Very low brass instrument pitched in F or E-flat |
| SAX | Eponymous instrument maker Adolphe |
| ALTO | Kind of horn pitched in E flat |
| TENORSAX | Jazz instrument pitched in the key of B flat |
| EUPHONIUM | A brass instrument pitched higher than a tuba |
| KHAKI | From Persian for "dust", a dull brownish-yellow material first used for uniforms by British troops in India in the 1840s; or, said cloth's colour (5) |
| KAWAU | In the 1840s, which Hauraki Gulf island was the site of copper mines? (5) |
| CANCAN | High energy, physically demanding dance that became popular in music halls in the 1840s (3-3) |
| GOLDRUSH | Search for a precious metal in California in the 1840s/50s (4,4) |
| OAKUM | Picking this substance, i.e. taking apart old rope for its fibres, was introduced to British prisons in the 1840s as an additional punishment |
| THESMURFS | Blue comic book characters created by the Belgian comics artist Peyo in 1958 (3,6) |
| THREEMANINATUBA | The butcher, the baker and the big brass instrument maker? |
| THREEMENINATUBA | The butcher, the baker and the big brass instrument maker? |
| FAHRENHEIT | What was the surname of the German instrument-maker who pioneered the use of mercury? (10) |
| FLEETPRISON | London jail closed in the 1840s (5,6) |
| ASTOR | Wealthiest American in the 1840s |
| IRE | Source of much U.S. immigration in the 1840s: Abbr. |
| KEROSENE | Combustible hydrocarbon liquid, a petroleum derivative, discovered in the 1840s (8) |
