| Answer | Crossword Clue |
|---|---|
| WHEEL | Very early invention |
| WHEEL | Early invention |
| WHEEL | Important early invention |
| CANNELLONI | Tubular invention of the late teens or early twenties |
| MACADAM | Early 19th-century invention named after a Scottish engineer |
| FIB | Not a very big invention |
| IDEA | The very beginning of an invention |
