| SKARABRAE | Stone-built Neolithic village on Mainland, Orkney |
| CHURCHILLBARRIERS | Concrete causeways, built in the Second World War, linking mainland Orkney with Burray and South Ronaldsay |
| SKARA | Down Neolithic village in the Orkney Islands, NE Scotland (5,4) |
| BRAE | Skara _, a Neolithic village in the Orkney Islands (4) |
| DEERNESS | A quoad sacra parish and peninsula in Mainland, Orkney |
| HARRAY | Largest loch in mainland Orkney (6) |
| EYNHALLOWSOUND | Seaway between Mainland Orkney and Rousay Island (9,5) |
| CISTS | Ancient stone-built coffins |
| IOTA | Funds taken from foundation stone, built absolutely nothing (3,3,4) |
| NOTONE | Funds taken from foundation stone, built absolutely nothing (3,3,4) |
| CIST | Stone-built box; tics (anag.) (4) |
| LERWICK | Fishing town on Mainland in the Shetland Isles, Scotland (7) |
| BRETON | The only Celtic language spoken on mainland Europe |
| BRONX | Borough on mainland of New York City (5) |
| KIRKWALL | A town on Mainland (8) |
| BROUGHOFBIRSAY | Tidal island off Mainland Orkney with Norse and Pictish ruins (6,2,6) |
| EYNHALLOW | A now uninhabited islet off Mainland Orkney, originally believed to be the summer home of the Finfolk (9) |
| BUTTRESS | A construction, usually of brick or stone, built to support a wall (8) |
| EMBANKMENT | A wall of earth or stone built to prevent a river flooding an area (10) |
| CAIRN | A mound of rough stones built as a memorial or landmark, typically on a hilltop or skyline (5) |
