Related Clues:
- Solid, unlike a piece of cake
- Like a tough nut to crack
- Like a path that's cobbled together?
- Very challenging
- Tough to learn
- Pebble-strewn way round New York
- Player's challenge? I sympathise
- Tiring party, breaking rocks perhaps
- Far from easy
- Difficult; severe
- Like verified facts
- Dickens' times were this tough!
- Word with cash or candy
- Hard to plow, perhaps
- Were Dickens' times this tough?