Answer:

chis

Answer	Crossword Clue
CHIS	XXX
CHIS	Phi followers
CHIS	Letters from Greece

CHIS	Greek X's
CHIS	Greek letters
CHIS	XXX look-alikes
CHIS	Psis' preceders
CHIS	Psi preceders
CHIS	Xenophon's X's
CHIS	XXX, to the Greeks
CHIS	X's for Xenophon

CHIS	Greek Xs
CHIS	X's, to Xanthus
CHIS	Greek consonants
CHIS	X's, in Crete
CHIS	Letters after phis
CHIS	Frat letters
CHIS	Hellenic consonants
CHIS	Greek letters.

CHIS	X's for Xanthippe
CHIS	Followers of phis
CHIS	Phis' followers
CHIS	X's
CHIS	Psis' predecessors
CHIS	XXX, in a way
CHIS	Sigma ... (fraternity men)
CHIS	X's, in Greece

CHIS	XXX abroad
CHIS	Parts of some chapter names
CHIS	X X X
CHIS	XXXXX, to the Greeks
CHIS	Certain Greek letters
CHIS	Xs
CHIS	Sorority letters
CHIS	X, X, X

CHIS	Antepenultimate letters
CHIS	Greek characters

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.