| Answer | Crossword Clue |
|---|---|
| PSI | Twenty-third Greek letter |
| TAV | Twenty-third Hebrew letter |
| PSIS | Twenty-third Greek letters |
| CHI | Twenty-second letter of the Greek alphabet |
| chis | the twenty-second letter of the Greek alphabet |
| chi | the twenty-second letter of the Greek alphabet |
| GAMMA | Third Greek letter. |
| GAMMA | Third Greek letter |
| CHI | Third-to-last Greek letter |
| GAMMA | Third letter of the Greek alphabet |
| GAMMA | Third letter in the Greek alphabet |
| RHO | First letter in the last third of the Greek alphabet |
| ETA | Penultimate letter in the first third of the Greek alphabet |
