| Synthetic rubber bases | 22 |
| Commercial prefix with foam | 27 |
| Prefix in a Dow trademark | 25 |
| Carton-cushioning unit | 22 |
| "Nat Turner" author | 29 |
| "Mr. Roboto" band | 27 |
| River to the underworld | 23 |
| River of Greek mythology | 24 |
| River ferried by Charon | 23 |
| It circles Hades nine times | 27 |
| Charon's workplace | 22 |
| Zeus swore oaths upon it | 24 |
| Where Achilles was bathed | 25 |
| Site of underworld bribes | 25 |
| Site of Charon's ferry | 26 |
| River of the underworld | 23 |
| River encircling Hades | 22 |
| River crossed by Orpheus | 24 |
| River crossed by Charon | 23 |
| River circling the underworld | 29 |
| River beyond the grave | 22 |
| Mythological ferry locale | 25 |
| Mother of Nike, in Greek myth | 29 |
| It circled Hades nine times | 27 |
| Greek gods swore by it | 22 |
| Frightful river to cross | 24 |
| Ferryman Charon's river | 27 |
| Charon's ferry route | 24 |
| Band named for a river | 22 |
| Achilles was dipped into it | 27 |
| Achilles was dipped in it | 25 |
| "Renegade" band | 25 |
| "Lady" group | 22 |
| "Babe" group | 22 |
| Possessive Latin pronoun | 24 |
| Word on a Roman towel? | 22 |
| ___ sponte (legal term) | 23 |
| Subject to legal action | 23 |
| Ripe for a trial lawyer | 23 |
| Metalworking tools: Var. | 24 |
| ___ pan, Chinese abacus | 23 |
| ___ pan (Chinese abacus) | 24 |
| Capable of convincing a jury | 28 |
| Charming and confident | 22 |
| Socially smooth and polished | 28 |
| Like a smooth operator | 22 |
| Exhibiting savoir-faire | 23 |
| Charmingly sophisticated | 24 |
| Like many a matinee idol | 24 |
| Like Cary Grant characters | 26 |
| Like 007, not Austin Powers | 27 |
| Underwater vessel, briefly | 26 |
| Underwater craft, briefly | 25 |
| Undersea prowler, briefly | 25 |
| Undersea craft (Abbr.) | 22 |
| Torpedo, or its launcher | 24 |
| Prefix with let or lease | 24 |
| Prefix for way or marine | 24 |
| Part of a Quiznos combo meal | 28 |
| Lead-in for zero or prime | 25 |
| Large sandwich, for short | 25 |
| Easily pranked teacher, maybe | 29 |
| Come off the bench (for) | 24 |
| Captain Nemo's workplace | 28 |
| Big sandwich, for short | 23 |
| Moderately dry, climatewise | 27 |
| Toyota RAV4 competitor | 22 |
| Japanese compact S.U.V. | 23 |
| Foresters, for example | 22 |
| Took the place of a regular | 27 |
| Came off the bench (for) | 24 |
| Outsource, as part of a job | 27 |
| Construction project bidder | 27 |
| Non-mainstream social group | 27 |
| Low-ranking clergy officials | 28 |
| Make pieces of pieces? | 22 |
| Suburban neighborhood, often | 28 |
| Vanquisher's savagery? | 26 |
| Ester of acid from cork | 23 |
| Suddenly, to the maestro | 24 |
| Abruptly, on a musical score | 28 |
| Part of a sentence (Abbr.) | 26 |
| Part of a sentence: Abbr | 24 |
| Field of study (abbr.) | 22 |
| Common sentence structure | 25 |
| Some rental agreements | 22 |
| Become lessor while lessee | 26 |
| Temporary residence, maybe | 26 |
| Take another's place? | 25 |
| Re-rent one's apartment | 27 |
| Lease prohibition, often | 24 |
| Become a tenant's tenant | 28 |
| In a magnificent manner | 23 |
| Sensational sapphire, say? | 26 |
| Like underhanded advertising | 28 |
| Kind of TV ad technique | 23 |
| Kind of subtle ad technique | 27 |
| Nemo's transportation | 25 |
| Sink below the surface | 22 |
| Put under water (Var.) | 22 |