| YELLOWSTONE | Name of the enormous crater in the western-central portion of northwestern Wyoming formed by a cataclysmic volcanic eruption some 640,000 years ago. It is found in (and shares the name of) one of the |
| BORIS | A small lunar crater in the Mare Imbrium (5) |
| PELEW | A chain of more than 200 islands about 400 miles long in the western central Pacific Ocean. |
| PALAU | Republic in the western central Pacific Ocean (5) |
| BAJACALIFORNIA | Spanish name for Lower California, the peninsula of northwestern Mexico, bounded by the United States, the Gulf of California, and the Pacific Ocean. (4,10) |
| HUB | Central portion of a wheel through which the axle passes (3) |
| MASAI | Now a World Heritage site, the Ngorongoro Crater in Tanzania used to be inhabited by members of this |
| NUCLEUS | Central portion in the head of a comet (7) |
| NOOTKA | A member of the Wakashan people living on Vancouver Island and in the Cape Flattery region of northwestern Washington. |
| HUBCAPS | Metal discs fitting onto the central portion of wheels (7) |
| BLAKE | Artist noted for his illustrations of Roald Dahl's characters including the BFG, the enormous crocodile, Muggle-Wump and the Twits (5) |
| EECUMMINGS | US poet and painter who wrote The Enormous Room in 1922 and Tulips and Chimneys a year later (1,1,8) |
| ARDEN | The forest location of As You Like It, apparently inspired by a region of northwestern Europe |
| SLIGO | Name of the county of northwestern Ireland in which Yeats's Innisfree is located (5) |
| STRATOVOLCANO | An example of a dormant one is Mount Edziza which is in the Tahltan Highlands of northwestern British Columbia |
| ATTEST | Certify central portion of data examination |
| CHEEVER | John --, author of the short story 'The Enormous Radio' (7) |
| IONIA | An ancient region of Western Central Asia Minor, including adjacent Aegean islands (5) |
| INCINERATOR | It's full of fire in crater, in circle erupting |
| SARASOTA | Yachting and fishing resort in western central Florida (8) |
