| OFFASDYKE | Earthwork that runs along some of the England Wales border, named after a king of Mercia (5,4) |
| MAGINOT | Line of fortifications on France's eastern border, named after a 1930s Minister of War (7) |
| OFFA | King of Mercia 757-796, whose name is connected with an earthen barrier that runs along the England-Wales border (4) |
| WYE | ---Valley, area noted for its limestone gorge straddling the southern part of the England-Wales border (3) |
| ARRAIGNED | Speaker's prevailed after a king's brought to court (9) |
| STBRIAVELS | Village in Gloucestershire near the England-Wales border housing a moated Norman castle |
| GENTIAN | What plant with violet trumpet-shaped flowers was named after a king of Illyria, who is said to have discovered its medicinal properties? (7) |
| AHAB | Literary protagonist named after a king of Israel |
| AEGEAN | Sea named after a king of Athens in Greek myth |
| DYKE | Large linear earthwork that roughly follows the border between England and Wales, Offa's _ (4) |
| DEE | River that forms part of the England/Wales boundary |
| RAIL | The bird that runs along the top of the fence (4) |
| RUEDERIVOLI | Street that runs along the north wing of the Louvre Palace in Paris (3,2,6) |
| STOUR | River in East Anglia that runs along part of the Suffolk-Essex border (5) |
| SKUNK | Nickname for the California Western Railroad - and a motorcar that ran along the route whose fumes emitted a pungent odour (5) |
| GUTTER | Channel that runs along the kerb of a road (6) |
| SKYS | Pitch that runs along the side of a webpage |
| DRINA | River in the Balkans that runs along the Bosnia-Serbia border (5) |
| CLIFF | A steep high rock face, especially one that runs along the seashore (5) |
| BIRDCAGEWALK | Street that runs along the south of St James's Park to Buckingham Palace |
