| 100% | LOWELL | 6 | Observatory from which Pluto was first spotted |
| 53% | PLANETS | 7 | Group from which Pluto was demoted |
| 42% | MOLD | 4 | Petri-dish growth from which penicillin was first identified |
| 42% | UCLA | 4 | West Coast school from which the first Internet transmission was sent, in 1969: Abbr. |
| 42% | ADOLF | 5 | First name from which the "Adi" in Adidas is derived |
| 38% | IFALLTOPIECES | 13 | Song by 17a from her album "Showcase" which was her first number one hit: 4 wds. |
| 38% | MENU | 4 | From which starters are selected |
| 37% | TITULAR | 7 | From which a name is taken |
| 37% | ROBOT | 5 | Invention that was first mentioned in the sci-fi novel "R.U.R" by Karel Capek from which the name was derived |
| 36% | NEWKIDINTOWN | 12 | Grammy-winning song by the Eagles which was the first single from the same album as 15a: 4 wds. |
| 36% | FLAGSTAFF | 9 | Home of Arizona’s Lowell Observatory, at which Pluto was discovered |
| 35% | STRAW | 5 | From which gold is spun, in a fairy tale |
| 35% | YLEM | 4 | Substance from which the universe was created |
| 35% | PRIMROSE | 8 | Flower from which an oil is derived |
| 35% | LATIN | 5 | Language from which Romance languages are derived |
| 35% | DRAWEE | 6 | Bank from which a check is paid |
| 35% | LEATHER | 7 | Material from which baseball gloves are made |
| 35% | SOY | 3 | Bean from which many products are made |
| 35% | NCAA | 4 | Grp. from which many people are drafted |
| 35% | SOYA | 4 | Bean from which milk can be extracted |
| 35% | HENNA | 5 | Plant from which Indian mehndi is extracted |
| 35% | TORTS | 5 | Stuff from which some suits are made? |
| 35% | ORES | 4 | Substances from which metals can be extracted |
| 35% | ORE | 3 | Rock from which metals might be extracted |
| 35% | SOUTHPOLE | 9 | Place from which all directions are north |
| 35% | CTR | 3 | Pt. from which a radius is measured |
| 35% | SOYA | 4 | Bean from which some milk is made |
| 35% | RAMS | 4 | Animals from which shofars can be made |
| 35% | CREE | 4 | Language from which "pemmican" is derived |
| 35% | HINDI | 5 | Language from which "thug" is derived |