| 100% | KAONS | 5 | Particles consisting of a strange quark and an up or down antiquark |
| 49% | MESON | 5 | Particle composed of a quark and an antiquark |
| 43% | KAON | 4 | Particle that includes a strange quark or antiquark |
| 39% | KAON | 4 | Sub-atomic particle that includes a strange quark or antiquark |
| 39% | PROTONS | 7 | Particles composed of two up quarks and one down quark |
| 36% | CAR | 3 | It goes back and forth on a street or up and down in an elevator shaft |
| 36% | MESON | 5 | A quark and an antiquark |
| 33% | ACROSS | 6 | Direction of a row; left to right, not up and down |
| 32% | PROTON | 6 | Two up quarks and a down quark |
| 32% | PINCHO | 6 | Layered Spanish appetizer consisting of bread, meat, or veggies and served on a stick |
| 32% | COLLAGE | 7 | Art technique consisting of cutting and pasting materials to a painted or unpainted surface |
| 32% | NEWSPAPERCOLUMN | 15 | Place to express an opinion ... or a literal description of 3-, 7-, 9- and 21-Down? |
| 31% | FINALIZE | 8 | Wrap up … or a phonetic description of 17-, 19-, 25-, 41- and 54-Across |
| 30% | YOYO | 4 | Move up and down, like body weight or a toy on a string: Hyph. |
| 30% | SCARLET | 7 | With 38-Across, symbols of a scandal ... or what 16-, 23-, 47- and 58-Across consist of (in their entirety)? |
| 30% | WETLAND | 7 | Area consisting of a marsh or swamp |
| 30% | BUST | 4 | Sculpture consisting of a head and shoulders |
| 29% | SCROLL | 6 | Move up or down a computer screen |
| 29% | LASTONESTANDING | 15 | Survivor of an all-out brawl ... or a hint to 23-, 38-, 64- and 87-Across |
| 29% | SWORD | 5 | Historical weapon consisting of a handle and blade |
| 29% | STAIR | 5 | Part of a flight going up (or down) |
| 29% | INNING | 6 | It consists of a top and a bottom |
| 29% | IRIS | 4 | It consists of a pupillary and ciliary zone |
| 29% | LATEBLOOMER | 11 | One who catches up eventually ... or a hint to the ends of 17-, 30- and 46-Across |
| 29% | RSVPING | 7 | Acknowledging an invitation ... or a hint to the starts of 19-, 32-, 39- and 49-Across |
| 29% | UNCH | 4 | Not up or down, as a stock price: Abbr. |
| 29% | INLOW | 5 | Like trucks going up or down a steep hill |
| 29% | STAIR | 5 | A way up or down |
| 28% | PINATA | 6 | Plaything consisting of a container filled with toys and candy |