Answer:

kappa

Answer	Crossword Clue
KAPPA	Phi Beta ..
KAPPA	Letter before lambda
KAPPA	Key letter

KAPPA	Iota's follower
KAPPA	Fraternity letter
KAPPA	Beta follower?
KAPPA	Frat letter
KAPPA	Iota follower
KAPPA	Letter after iota
KAPPA	Tenth letter of the Greek alphabet
KAPPA	Greek letter

KAPPA	Publisher of GAMES Magazine
KAPPA	Society name letter
KAPPA	Phi Beta ...
KAPPA	Sophocles character?
KAPPA	Greek alphabet's tenth letter
KAPPA	Honor society letter
KAPPA	Corinthian's K
KAPPA	Letter on some keys

KAPPA	Letter on a key
KAPPA	Sorority letter
KAPPA	Letter between iota and lambda
KAPPA	Tenth Greek letter
KAPPA	Greek letter.
KAPPA	Phi Beta ....
KAPPA	After iota.
KAPPA	Part of PBK.

KAPPA	Tenth in a series.
KAPPA	Between iota and lambda
KAPPA	Certain sorority woman
KAPPA	Letter after Beta in a society's name
KAPPA	Symbol of Einstein's gravitational constant
KAPPA	It's after iota
KAPPA	Certain sorority member
KAPPA	Greek letter before lambda

KAPPA	Letter for a scholar?
KAPPA	Capital of Korinthos?
KAPPA	Tenth letter
KAPPA	Letter on an honor society key
KAPPA	Fraternity consonant