| 100% | SCIATIC | 7 | — nerve, that part of the nervous system beginning in the lower back and extending down the thigh |
| 37% | LOIN | 4 | That part of the lower back also called the lumbus |
| 36% | KETO | 4 | Diet that's high in fats and low in carbs, as illustrated by parts of the answers to the starred clues |
| 35% | THIGH | 5 | That part of the leg between the hip and the knee in man |
| 35% | THIGH | 5 | That part of the leg between the hip and the knee in humans |
| 35% | ISCHIUM | 7 | Lower and back part of the human hip bone |
| 35% | NEUROLOGY | 9 | Study of nerves and the nervous system |
| 34% | EARLOBE | 7 | Soft lower part of the ear that hangs down |
| 34% | THROAT | 6 | Part of the body that's with ear and nose in ENT |
| 33% | LIMBIC | 6 | ___ system, part of the brain that regulates emotion, behavior and long-term memory |
| 33% | ORI | 3 | Part of the of HHS that oversees and directs honesty and ethics in PHS experiment and exploration activities (abbr.) |
| 32% | BOTHSIDESNOW | 12 | 12-Down hit song that begins with the lyrics "Rows and flows of angel hair / And ice cream castles in the air" (3 wds.) |
| 32% | GITRACT | 7 | Part of the digestive system, in brief |
| 31% | SCIATICA | 8 | Condition causing pain in the lower back and leg |
| 31% | EAGLE | 5 | ___ Island, island in Antarctica that is volcanic in origin and part of the James Ross Island Volcanic Group |
| 31% | LIMO | 4 | Car that might have ice buckets and bottles of champagne in the back seat |
| 31% | OVARY | 5 | Part of the reproductive system that produces eggs |
| 31% | WALTDISNEY | 10 | Company that produced the movies in the first parts of 18-, 26- and 46-Across |
| 31% | LOIN | 4 | Part of the lower back also called the lumbus |
| 31% | BOWEL | 5 | Lower part of the digestive system (rhymes with "towel") |
| 31% | IRIS | 4 | Part of the eye that comes in different colors |
| 31% | TIMOR | 5 | — Sea, that part of the Indian Ocean west of the Arafura Sea and north of Australia |
| 30% | LOIN | 4 | The part of the lower back also called the lumbus |
| 30% | PAW | 3 | Part of a dog that's in the Iams logo |
| 30% | OOHED | 5 | Part of the expression that includes '... and aahed' |
| 30% | ENCEPHALON | 10 | Part of the central nervous system |
| 30% | CALF | 4 | Back part of the lower leg |
| 30% | DESIGNATED | 10 | Word that can precede the last parts of 17-Across and 10- and 25-Down |
| 30% | VEGETABLES | 10 | Word that can follow the first parts of 17-Across and 10- and 24-Down |
| 30% | OBI | 3 | Broad sash tied in a large bow at the back worn by Japanese women and children as part of the national costume |