| Answer | Crossword Clue |
|---|---|
| PSI | 23rd of a Greek series |
| PSI | 23rd in a series |
| OMEGA | End of a Greek series |
| OMEGA | Last in a Greek series |
| GAMMA | Third in a Greek series |
| BETA | Second in a Greek series |
| ETA | Seventh in a Greek series |
| TAU | 19th in a Greek series |
| EPSILON | Fifth in a Greek series |
