| SANBLAS | - Islands, archipelago off the north coast of the Isthmus of Panama (3,4) |
| ATRATO | River rising in Colombia that meanders north across the base of the Isthmus of Panama to the Gulf of Uraba (6) |
| ORKNEY | ___ Islands (Archipelago off Scotland's northeastern coast) |
| CORINTH | The Isthmus of - connects the Peloponnesus with the mainland of Greece (7) |
| KARASEA | Shallow arm of the Arctic Ocean east of Novaya Zemlya off the north coast of Russia (4,3) |
| CANALZONE | Former administrative region of the U.S. on the Isthmus of Panama (5,4) |
| TORTUGA | Island in the Caribbean off the north coast of Haiti (7) |
| AMERICAS | Landmass consisting of two continents connected by the Isthmus of Panama (8) |
| OAXACA | A republic on the Isthmus of Panama (6) |
| COSTARICA | Republic in Central America on the Isthmus of Panama (5,4) |
| RATHLIN | Blow top in anger, when nothing is sent across to island off the north coast |
| KRA | The Isthmus of --- is a narrow neck of the Malay Peninsula between the Gulf of Thailand and the Andaman Sea (3) |
| ATHEIST | One with no faith in Panama (the isthmus) (7) |
| NECKTIE | Cup match on the isthmus could be a formality (7) |
| SEATTLE | US city on the isthmus between Lake Washington and Puget Sound (7) |
| PELOPONNESE | The - - -, southern peninsula of Greece, joined to central Greece by the Isthmus of Corinth (11) |
| SHETLANDS | Archipelago off the north coast of Scotland (9) |
| ZUIDER | Former inlet of the North Sea in the north coast of the Netherlands (6) |
| ZEE | Former inlet of the North Sea in the north coast of the Netherlands (3) |
| MALAY | Also called Kra Peninsula, this long, narrow appendix of Asia extends south for a distance of about 700 miles (1,127 km) through the Isthmus of Kra to Cape Pia. (5) |
