| 100% | ARAN | 4 | — Islands, group of three isles in the Atlantic off the Republic of Ireland |
| 91% | ARAN | 4 | — Islands, group of three isles in the Atlantic off Galway Bay, Republic of Ireland |
| 50% | BANTRYBAY | 9 | Inlet of the Atlantic Ocean in Cork, Republic of Ireland, housing Whiddy Island |
| 50% | BANTRY | 6 | — Bay, inlet of the Atlantic Ocean in Cork, Republic of Ireland, housing Whiddy Island |
| 46% | TRISTAN | 7 | & 21A Group of volcanic islands in the South Atlantic including Inaccessible and Nightingale |
| 46% | NEEDLES | 7 | The —, group of chalk stacks in the English Channel off the coast of the Isle of Wight |
| 45% | HAMSTRING | 9 | Group of three muscles in the back of the thigh |
| 44% | MAN | 3 | Isle of —, island in the Irish Sea between Cumbria and Northern Ireland |
| 43% | HAMSTRING | 9 | Group of three muscles in the thigh; often pulled |
| 42% | YOUTH | 5 | Isle of —, island in the Caribbean Sea off SW Cuba formerly called the Isle of Pines |
| 42% | ISLEOF | 6 | & 13A Island in the Caribbean Sea off SW Cuba formerly called the Isle of Pines |
| 41% | SAMOA | 5 | Group of volcanic islands in the south Pacific ocean |
| 41% | EPSON | 5 | One of three companies in the Seiko Group |
| 40% | MALDIVES | 8 | Group of coral islands in the Indian Ocean whose capital is Male |
| 40% | SULPA | 5 | Island off the coast of Cebu in the Philippines |
| 39% | RHODES | 6 | Largest of the Dodecanese group of Greek islands in the Aegean Sea |
| 39% | SOMETHINGSFISHY | 15 | "Hmmmmm ..." [as hinted at by the three groups of black squares in the middle of the grid] |
| 39% | SPORADES | 8 | Name given to two groups of Greek islands in the Aegean Sea; the Northern — and Southern — |
| 38% | ANTILLES | 8 | Group of islands in the Caribbean consisting of the Greater — and Lesser — |
| 38% | KILKENNY | 8 | City in Leinster, Republic of Ireland, on the River Nore |
| 38% | CANARIES | 8 | Island group off the co*t of Africa |
| 38% | CAPRI | 5 | Island off Italy in the Gulf of Naples |
| 38% | TRALEE | 6 | Seaport in County Kerry, Republic of Ireland, on the River Lee |
| 38% | WATERFORD | 9 | Seaport in Munster, southeast Republic of Ireland, on the River Suir |
| 38% | TRIO | 4 | What the holy group of three in 26a can be called |
| 38% | CYCLADES | 8 | Group of islands in the Aegean Sea including Anafi |
| 38% | CAPRI | 5 | Island off west Italy in the Bay of Naples |
| 38% | AZORES | 6 | Portuguese island group in the Atlantic Ocean |