| Answer | Crossword Clue |
|---|---|
| RIGORS | These cause tough going |
| TREK | Tough going |
| SLOG | Tough going |
| HARDLUCK | Tough going |
| ORDEAL | Tough going |
| DENSEJUNGLE | Tough going for Tarzan, perhaps |
| MUDDYTRACK | Tough going for most thoroughbreds. |
| BLEAKOUTHOUSE | Place where the going is tough? |
| KNUTEROCKNE | "When the going gets tough, the tough get going" |
| HEARTRATE | It may get going when the going gets tough |
