Related Clues:
- Like steel
- Complex measure at sea, extremely tricky
- Like dried cement
- Like some facts and stuff
- Solid, firm, rigid
- Grueling
- Solid or difficult to do
- Contents of tank (not tyres) providing problems?
- Where Diddy Men live, saving remains perplexing
- Not easily solved
- Hurry _____(Skip's command)
- With 60-Down, gotten by great effort
- Difficult — intricate
- A____ lesson
- Not soft