| Prison for corny humorists? | 27 |
| Prison for gardeners? | 21 |
| Prison for soda jerks? | 22 |
| Prison for the Nittany Lions? | 29 |
| Prison for vintners? | 20 |
| Prison fund-raisers? | 20 |
| Prison gang leaders? | 20 |
| Prison graffiti or implications? | 32 |
| Prison guard | 12 |
| Prison guard system? | 20 |
| Prison guard, in slang | 22 |
| Prison guard? | 13 |
| Prison in 1971 headlines | 24 |
| Prison in 1971 news | 19 |
| Prison in a Johnny Cash song | 28 |
| Prison in a Johnny Cash tune | 28 |
| Prison in a Stephen King novella | 32 |
| Prison in Johnny Cash song | 26 |
| Prison in which Johnny Cash famously performed | 46 |
| Prison inmate | 13 |
| Prison inmates | 14 |
| Prison keeper, in England | 25 |
| Prison knife | 12 |
| Prison library's contents? | 30 |
| Prison management | 17 |
| Prison mob scenes | 17 |
| Prison movie about a medical miracle? | 37 |
| Prison name chanted in "Dog Day Afternoon" | 52 |
| Prison occupant | 15 |
| Prison of fame | 14 |
| Prison of fiction | 17 |
| Prison officials | 16 |
| Prison on a ship | 16 |
| Prison or hospital divisions | 28 |
| Prison outbreak | 15 |
| Prison part | 11 |
| Prison parts | 12 |
| Prison party? | 13 |
| Prison pattern | 14 |
| Prison performer? | 17 |
| Prison periods | 14 |
| Prison population | 17 |
| Prison problem | 14 |
| Prison problems | 15 |
| Prison protests | 15 |
| Prison provender | 16 |
| Prison punishment | 17 |
| Prison quarters | 15 |
| Prison rebel, perhaps | 21 |
| Prison rec area | 15 |
| Prison recreation area | 22 |
| Prison resident | 15 |
| Prison room | 11 |
| Prison rooms | 12 |
| Prison section | 14 |
| Prison security measure | 23 |
| Prison sentence | 15 |
| Prison sentence shortener | 25 |
| Prison sentence that may be "without parole" | 54 |
| Prison sentences | 16 |
| Prison sentry's quarry | 26 |
| Prison seriously in need of reform? | 35 |
| Prison social event? | 20 |
| Prison staple | 13 |
| Prison stormed in 1789 | 22 |
| Prison stormed on July 14, 1789 | 31 |
| Prison term | 11 |
| Prison terms | 12 |
| Prison that hosted Johnny Cash in 1968 | 38 |
| Prison the current prez has failed to close | 43 |
| Prison threshold (represented by this 4x4 corner) at which the solver must arrive | 81 |
| Prison time alternative | 23 |
| Prison transport? | 17 |
| Prison ultimatum? | 17 |
| Prison unit | 11 |
| Prison units | 12 |
| Prison unrest | 13 |
| Prison uprising | 15 |
| Prison uprisings | 16 |
| Prison warden's concern | 27 |
| Prison wardress | 15 |
| Prison weapon | 13 |
| Prison weaponry | 15 |
| Prison weapons | 14 |
| Prison workers' respite? | 28 |
| Prison yard residents | 21 |
| Prison ___ | 10 |
| Prison's antithesis, with "the" | 45 |
| Prison, for short | 17 |
| Prison, in Portsmouth | 21 |
| Prison, in slang | 16 |
| Prison, informally | 18 |
| Prison, slangily | 16 |
| Prison, to British | 18 |
| Prison-based | 12 |
| Prison-cake ingredient | 22 |
| Prison-door sound | 17 |
| Prison-film plot elements | 25 |
| Prison-movie event, perhaps | 27 |
| Prison-related | 14 |