| Answer | Crossword Clue |
|---|---|
| POSER | Tough nut |
| ACORN | Tough nut |
| PROBLEM | Tough nut |
| POSER | Tough nut to crack |
| ENIGMA | Tough nut to crack |
| PECAN | Tough nut to crack |
| ACORN | Tough nut to crack |
| POSER | Tough nut to crack. |
| ACORN | It's a tough nut to crack |
| tryma | nut having an outer shell that becomes tough and dry and eventually splits open, as in the walnut and hickory |
| trymata | nut having an outer shell that becomes tough and dry and eventually splits open, as in the walnut and hickory |
