Answer: CORNERSTONE
The answer CORNERSTONE has 26 possible clues. See the results below.
Possible Clues:
- Foundation
- Building block
- Something of prime importance
- Architectural marker, or what can be found four times in this puzzle
- Place to find a date ... and any one of four in this puzzle (circled letters are hints)
- Thing of prime importance
- One is two-faced and hard and occupies an important position
- Free shot at calculus - it's of prime importance
- Fix flag — it's of prime importance
- Vital person goes round the bend, note — crazy