| Answer | Crossword Clue |
|---|---|
| STYX | River to the underworld |
| STYX | River circling the underworld |
| STYX | River of the underworld |
| STYX | Mythological river of the underworld |
| STYX | River of the underworld, in myth |
| STYX | Underworld river |
| LETHE | Underworld river |
| LETHE | Greek underworld river |
| STYX | Greek underworld river |
| STYX | Underworld river of mythology |
| STYX | Mythological underworld boundary river |
| STYX | Underworld river ferried by Charon |
| SPYSSTYXMYTH | Underworld river legend as told by a double agent? |
