Answer:

omicron

AnswerCrossword Clue
OMICRONPlato's o
OMICRONXi follower
OMICRONPi preceder
OMICRONGreek letter
OMICRONGreek for "little O"
OMICRONGreek vowel
OMICRONFrat letter
OMICRONHoi polloi character
OMICRONXi-pi go-between
OMICRONO in Greek.
OMICRONFifteenth letter of Greek alphabet.
OMICRONGreek letter.
OMICRONBetween xi and pi
OMICRONFraternity letter
OMICRONCircular Greek letter
OMICRONFirst letter given to Odysseus
OMICRONAwfully moronic character from Greece (7)
OMICRONCertain fraternity chapter
OMICRONA fraternity chapter
OMICRONO
OMICRONOriginal opening to Homer's "Odyssey"?
OMICRONHead of Olympus?
OMICRON15th letter of the Greek alphabet
OMICRONO or O