| Thick-skinned herbivores | 24 |
| They're thick-skinned | 25 |
| Horny beasts | 12 |
| Zoo critters | 12 |
| Thick-skinned creatures | 23 |
| Large-horned mammals | 20 |
| Endangered Sumatrans | 20 |
| Veld chargers | 13 |
| Three-toed critters | 19 |
| Thick-skinned critters | 22 |
| Thick-skinned beasts | 20 |
| They're thick-skinned and horny | 35 |
| They may be found in preserves, informally | 42 |
| Some megafauna | 14 |
| Savanna beasts | 14 |
| Protected wildlife | 18 |
| Protected pachyderms | 20 |
| Ones making lots of charges | 27 |
| One-horned beasts | 17 |
| Myopic mammals, informally | 26 |
| Myopic mammals | 14 |
| Massive mammals, for short | 26 |
| Java denizens | 13 |
| Hulking herbivores | 18 |
| Horned zoo animals, briefly | 27 |
| Horned sights on safaris | 24 |
| Horned jungle beasts | 20 |
| Horned heavyweights | 19 |
| Horn-snouted animals | 20 |
| Endangered ungulates | 20 |
| Charging things? | 16 |
| Big chargers in Africa | 22 |
| Big beasts, for short | 21 |
| Animals with calves | 19 |
| African mammals, for short | 26 |
| Afr. horned mammals | 19 |
| Pi follower | 11 |
| Letter after pi | 15 |
| Sigma preceder | 14 |
| Letter before sigma | 19 |
| Density symbol, in physics | 26 |
| Density symbol | 14 |
| Greek P | 7 |
| 17th Greek letter | 17 |
| Plato's P | 13 |
| Symbol for density | 18 |
| Pi-sigma connection | 19 |
| P, to Pythagoras | 16 |
| Letter between pi and sigma | 27 |
| Pi-sigma link | 13 |
| Pi-sigma go-between | 19 |
| P, in the Greek alphabet | 24 |
| Pythagorean P | 13 |
| Pi's follower | 17 |
| P, to Plato | 11 |
| P, on a fraternity house | 24 |
| P, in Greece | 12 |
| P-shaped Greek letter | 21 |
| Density symbol, in mechanics | 28 |
| Christogram component | 21 |
| After pi | 8 |
| Seventeenth Greek letter | 24 |
| P-like letter | 13 |
| It's after pi | 17 |
| 17th letter of the Greek alphabet | 33 |
| "P" on fraternity row | 31 |
| Sigma follows it | 16 |
| Pi's successor | 18 |
| Part of the Greek alphabet | 26 |
| P, on a fraternity jacket | 25 |
| P on fraternity row | 19 |
| Before sigma | 12 |
| Peloponnesian P | 15 |
| P, to the Greeks | 16 |
| P, to Greeks | 12 |
| P-like Greek letter | 19 |
| P at the Parthenon | 18 |
| Greek letter that looks like a "P" | 44 |
| Fraternity "P" | 24 |
| Frat row letter | 15 |
| First letter in the last third of the Greek alphabet | 52 |
| Chi ___ (religious symbol) | 26 |
| Certain sorority chapter | 24 |
| Between pi and sigma | 20 |
| Air density symbol | 18 |
| When written three times, fraternity in "Revenge of the Nerds" | 72 |
| When tripled, a crew member's fraternity? | 45 |
| When said three times, a crew member's fraternity? | 54 |
| What sigma follows | 18 |
| The "r" in Aristotle | 30 |
| Symbol of mass density | 22 |
| Sigma's predecessor | 23 |
| Sigma predecessor | 17 |
| Sigma neighbor | 14 |
| Secondary character in Aristophanes? | 36 |
| Reflectance symbol | 18 |
| Pythagorean character | 21 |
| Pi–sigma connection | 26 |
| Pi Sigma separator | 18 |
| Pi neighbor | 11 |