| Answer | Crossword Clue |
|---|---|
| BEAR | Real toughie |
| GORDIANKNOT | Real toughie |
| BEAR | Real toughie, informally |
| STUMPER | Toughie |
| POSER | Toughie |
| LULU | Toughie |
| ENIGMA | Toughie |
| BEAR | Toughie |
| IDIOM | TOEFL toughie |
| HOOD | Young toughie |
| SPLIT | Bowler's toughie |
| IDIOM | ESL student's toughie |
| IDIOM | Toughie for an ESL student |
| IDIOM | Toughie for a language learner |
