| Answer | Crossword Clue |
|---|---|
| PHI | Letter after upsilon |
| PHI | Greek letter after upsilon |
| CHI | Second letter after upsilon |
| TAU | Letter before upsilon |
| upsilons | UPSILON, a Greek letter |
| TAU | Letter that comes before upsilon |
| TAU | Letter between sigma and upsilon |
| PHI | Letter between upsilon and chi |
