Crossword Clue:

Upsilon preceder

Answer	Crossword Clue
TAU	Upsilon preceder
PSI	... Upsilon.
PHI	After upsilon

TAU	Upsilon predecessor
TAU	Before upsilon
PHI	Upsilon follower
PHI	Upsilon chaser
PSI	Upsilon follower
TAU	It precedes upsilon
PHI	Next after upsilon.
PHI	Letter after upsilon

TAU	Sigma upsilon separator
PHI	Follower of upsilon
TAU	Letter before upsilon
TAU	Sigma-Upsilon connection
CHI	Second letter after upsilon
TAU	Between sigma and upsilon.
TAU	Sigma-upsilon go-between
PHI	Greek letter after upsilon

TAU	Letter that comes before upsilon
TAU	Letter between sigma and upsilon
PHI	Letter between upsilon and chi
SIGMA	It's halfway between pi and upsilon
PHI	It is between upsilon and chi.