| PALAEOZOIC | Geological era with the Cambrian as its earliest period (10) |
| SIXTIES | Hippie era, with 'The' |
| ORDOVICIAN | Following just after the Cambrian Period, this period saw the evolution of compact insect-like marine animals called trilobites. |
| PLESIOSAUR | What large reptile of the Mesozoic era with a broad flat body and large paddle-like limbs lived in the sea? (10) |
| CRETACEOUS | Geological era between the Jurassic and Tertiary (10) |
| CATSCRADLE | Game with string showing Puss in its earliest place (4-6) |
| WELSHCORGI | Cambrian contralto or soldier seen with the Queen (5,5) |
| ADAMSEDGWICK | 19th-century English geologist who proposed and named the Cambrian period, part of the Palaeozoic era (4,8) |
| DAME | From the Latin for "mistress of the household", word for a female ruler in its earliest sense, now a title given to a woman with the rank of Knight Commander or a holder of the Grand Cross in the orde |
| PWLLHCLI | Resort on the Llyn peninsula, the terminus of the Cambrian Coast railway line (8) |
| SEVERN | With a notable tidal bore, river flowing 220 miles from its source in the Cambrian Mountains (6) |
| GOLD | Precious metal mined by the Romans some 2,000 years ago in the hillside Dolaucothi mines of the Cambrian mountains (4) |
| PRECAMBRIAN | Long time interval that came "before" the Cambrian Period. |
| DEVILSBRIDGE | - - Falls, tourist attraction in the Cambrian Mountains (6,6) |
| EOLITHIC | Of the earliest period of the Stone Age (8) |
| TRIASSIC | Earliest period of the Mesozoic era (8) |
| INFANT | What do we call a child during the earliest period of its life (6) |
| DEVONIAN | Fourth period of the Palaeozoic geological era, between the Silurian and Carboniferous (8) |
| WALES | Site of the Cambrian Mountains |
| CENOZOIC | Geological era that includes the Jurassic period when dinosaurs flourished (8) |
