| 100% | NEUTRON | 7 | Uncharged elementary particle with a mass nearly equal to that of the proton |
| 42% | POSITRON | 8 | Elementary particle of antimatter with the same mass as an electron, but a positive charge |
| 41% | PION | 4 | Particle with a mass about 270 times that of an electron |
| 35% | MONKEY | 6 | Proboscis ___, reddish-brown primate with a long nose that is endemic to the island of Borneo |
| 35% | NEUTRINO | 8 | Subatomic particle with a mass close to zero |
| 35% | PEPPERS | 7 | With 15 Across, illusion that uses a reflection to create the appearance of a phantom |
| 35% | ACRO | 4 | Prefix with "yoga" to mean the practice that involves a lot of lifting |
| 33% | LEMUR | 5 | Primate with large eyes and a long tail that is endemic to the island of Madagascar |
| 33% | COURT | 5 | Word with "ship" to refer to the course of a romantic relationship that might lead to marriage |
| 33% | BERRY | 5 | Word with "Smurf" to mean a red fruit that is a source of nutrition for the Smurfs |
| 33% | SAND | 4 | Beach particles that Sam Raimi studied under a microscope to create the anti-hero of "Spider-Man 3" |
| 33% | SMOG | 4 | Fog that has combined with excessive smoke in the air, often leading to a lot of lung diseases |
| 33% | BANG | 4 | "The Big ___ Theory," American sitcom with a few episodes that refer to "The Lord of the Rings" |
| 32% | PARIS | 5 | "From hell to breakfast in ___," idiom with the French capital that means "go through a wide range of experiences" |
| 31% | SLINGBACK | 9 | Shoe with a strap that nearly encircles the ankle |
| 31% | SNIFFLE | 7 | Affliction of the nose for those with a cold |
| 31% | LECOQ | 5 | With 36-Across, French title of a Rimsky-Korsakov opera that translates to "The Golden Rooster" |
| 31% | BLARNEY | 7 | — Castle, stronghold in County Cork, Republic of Ireland, housing a stone said to endow those who kiss it with the gift of flattery |
| 31% | JAPAN | 5 | Tokyo's country that holds a Guinness World Record for the smallest park, with an area equivalent to two sheets of A3 paper |
| 31% | DAME | 4 | Woman's title equal to the rank of a knight |
| 31% | PSALMS | 6 | Book of the Bible that starts with a silent letter |
| 31% | IRIS | 4 | Part of the eye that shares its name with a flower |
| 30% | CIDER | 5 | Christmas beverage with a scent that may remind you of the holidays |
| 30% | IRIS | 4 | Part of the eye that shares its name with a rainbow goddess |
| 30% | HIP | 3 | Part of the body that a fanny pack is often next to |
| 30% | MIDI | 4 | A type of skirt that extends to the mid-calf |
| 30% | ERASE | 5 | To rub out, as with the back of a pencil |
| 30% | PINE | 4 | Christmas tree type with a scent that may remind you of the holidays |
| 30% | YEAROFTHEMONKEY | 15 | 2004 ... with a hint to the starts of 20-, 34- and 51-Across |
| 30% | EXPOSURE | 8 | The amount of light that gets to a piece of film |