| Allergy specialist, perhaps | 27 |
| Tinnitus treater, for short | 27 |
| Rhinology expert, for short | 27 |
| Otolaryngologist, for short | 27 |
| M.D. concerned with tonsils | 27 |
| Ending with insist or exist | 27 |
| Ending for differ or insist | 27 |
| Apnea specialist, for short | 27 |
| International understanding | 27 |
| Arrangement between nations | 27 |
| Triple ___ of 1907–8 | 27 |
| "Door's open" | 27 |
| Tall key on a keypad, often | 27 |
| "Come in" command | 27 |
| First word of many a script | 27 |
| Carriage return, these days | 27 |
| Signed up for, as a contest | 27 |
| Follow the script, in a way | 27 |
| Responds to a cue, in a way | 27 |
| Dangle a carrot in front of | 27 |
| Opposite of "exo" | 27 |
| Group in a star's orbit | 27 |
| Building's surroundings | 27 |
| ___'acte (intermission) | 27 |
| ---'acte (intermission) | 27 |
| Fancy word for intermission | 27 |
| Broadway album instrumental | 27 |
| What wrestlers use rock for | 27 |
| Student selection criterion | 27 |
| Potential winner at Belmont | 27 |
| _____-temps (interval): Fr. | 27 |
| Chef's special, usually | 27 |
| "Specials," often | 27 |
| Tolkien's talking trees | 27 |
| Battle of Isengard warriors | 27 |
| Wooden creatures of fantasy | 27 |
| Wizards of aahs, for short? | 27 |
| Tolkien's forest giants | 27 |
| Tolkein's forest giants | 27 |
| Forest of Fangorn creatures | 27 |
| Accustom to hardship (Var.) | 27 |
| Cause to become hardened to | 27 |
| Become accustomed to (Var.) | 27 |
| Make immune, as to violence | 27 |
| Unsolicited manuscript enc. | 27 |
| Stationer's item: Abbr. | 27 |
| It may have a window: Abbr. | 27 |
| Resent another's ascent | 27 |
| Jealousy without resentment | 27 |
| New Age singer from Ireland | 27 |
| Single-named New Age singer | 27 |
| One-named Irish folk singer | 27 |
| New Age singer from Donegal | 27 |
| Grammy-winning Irish singer | 27 |
| Italian car magnate Ferrari | 27 |
| Car company founder Ferrari | 27 |
| Substance essential to life | 27 |
| Epoch when mammals appeared | 27 |
| Classified letters, perhaps | 27 |
| Letters in a help wanted ad | 27 |
| Extremely long unit of time | 27 |
| Long geologic time division | 27 |
| It's longer than an era | 27 |
| Division of geological time | 27 |
| A billion years, in geology | 27 |
| Two or more geological eras | 27 |
| Really long geological time | 27 |
| One hundred million decades | 27 |
| Largest geological division | 27 |
| Geologist's time period | 27 |
| Incalculable amount of time | 27 |
| A kazillion years, it seems | 27 |
| Unimaginably long stretches | 27 |
| Extremely long time periods | 27 |
| Sister of Helios and Selene | 27 |
| Greek counterpart of Aurora | 27 |
| Canon autofocus film system | 27 |
| Agcy. involved with cleanup | 27 |
| Gp. with emission standards | 27 |
| Air-quality monitoring org. | 27 |
| Watcher of the skies: abbr. | 27 |
| UV index monitor, for short | 27 |
| Org. in a war against grime | 27 |
| Environmentalists' org. | 27 |
| Energy Star program creator | 27 |
| Air quality monitor (abbr.) | 27 |
| Agency concerned with ecol. | 27 |
| Agcy. watching over ecology | 27 |
| Officer's embellishment | 27 |
| Lake Buena Vista attraction | 27 |
| Florida tourist destination | 27 |
| Theme park with a geosphere | 27 |
| Spaceship Earth is its icon | 27 |
| Park with a geodesic sphere | 27 |
| "En garde" weapon | 27 |
| Inventor of a sign language | 27 |
| It'll keep you on guard | 27 |
| Sport scored electronically | 27 |
| Weapon with a duel purpose? | 27 |
| Sword you score points with | 27 |