| Proud birds' mates | 22 |
| Protuberance on a toad | 22 |
| Protruding, as from water | 25 |
| Protruding knot on a tree | 25 |
| Protruding bellybutton | 22 |
| Protruded-lip expression | 24 |
| Protractor's measure | 24 |
| Protractor measurements | 23 |
| Protractor measurement | 22 |
| Protozoa with pseudopodia | 25 |
| Protozoa propellers, perhaps | 28 |
| Prototypical small town | 23 |
| Prototype flying auto of 1949 | 29 |
| Prototype detail, briefly | 25 |
| Prototype circuit device | 24 |
| Proton-enhanced opportunist? | 28 |
| Proton-enhanced cure-all? | 25 |
| Protomatter of the universe | 27 |
| Proto-helicopter designer | 25 |
| Protium and tritium, e.g. | 25 |
| Proteus and Valentine, e.g. | 27 |
| Proteus and Nereus, e.g. | 24 |
| Protests that go nowhere? | 25 |
| Protestors' deprivations | 28 |
| Protestor's replacement | 27 |
| Protestor's hang-up? | 24 |
| Protestor's handout | 23 |
| Protesting the pro-testers? | 27 |
| Protesters' shouts | 22 |
| Protesters' cries, often | 28 |
| Protesters' chorus | 22 |
| ProtesterÂ's device | 27 |
| Protester's tool, maybe | 27 |
| Protester's tactic | 22 |
| Protester's sign word | 25 |
| Protester's medium | 22 |
| Protester on horseback | 22 |
| Protested like a Pomeranian | 27 |
| Protested from the stands | 25 |
| Protested event, for short | 26 |
| Protested event, briefly | 24 |
| Protested at work, maybe | 24 |
| Protestant Reformation leader | 29 |
| Protestant Reformation figure | 29 |
| Protestant nonconformist | 24 |
| Protestant denomination | 23 |
| Protestant Church position | 26 |
| Protest-march participant | 25 |
| Protest to, kennel-style | 24 |
| Protest to one on the way out | 29 |
| Protest that gets out of hand | 29 |
| Protest participant, perhaps | 28 |
| Protest of the '60s | 23 |
| Protest of a numbers game? | 26 |
| Protest in no uncertain terms | 29 |
| Protein-synthesis strands | 25 |
| Protein-rich vegetarian soup | 28 |
| Protein-rich legume (Var.) | 26 |
| Protein-rich health food | 24 |
| Protein-rich bean, to a Brit | 28 |
| Protein-producing substance | 27 |
| Protein-building polymers | 25 |
| Protein-building polymer | 24 |
| Protein synthesizer: abbr. | 26 |
| Protein synthesizer in genes | 28 |
| Protein synthesis participant | 29 |
| Protein synthesis controller | 28 |
| Protein source for vegans | 25 |
| Protein source for Maoris | 25 |
| Protein shake spoonful | 22 |
| Protein production aid | 22 |
| Protein producer, for short | 27 |
| Protein powder retailer | 23 |
| Protein powder purveyor | 23 |
| Protein in wheat products | 25 |
| Protein in milk and eggs | 24 |
| Protein in hair and nails | 25 |
| Protein for a Stockholmer | 25 |
| Protein derived from a bean | 27 |
| Protein building blocks | 23 |
| Protein building block | 22 |
| Protein builder (Abbr.) | 23 |
| Protein acid, informally | 24 |
| Protein acid, for short | 23 |
| Protege of Vivaldi, Anna | 24 |
| Protects, as in a museum | 24 |
| Protects with heavy metal | 25 |
| Protects the quarterback | 24 |
| Protects against tampering | 26 |
| Protects a rock climber | 23 |
| Protects a hockey goal | 22 |
| Protectors of tiny shirts | 25 |
| Protectors in cold weather | 26 |
| Protectors from splats | 22 |
| Protectors for peepers | 22 |
| Protector of U.S. workers | 25 |
| Protector of the public | 23 |
| Protector of the president | 26 |
| Protector of the green | 22 |
| Protector of the crown? | 23 |