Crossword Clue:

Letter on a sorority house

Answer	Crossword Clue
TAU	Letter on a sorority house
SIGMA	Letter on a frat house
OMEGA	Letter on a frat house, perhaps

PHI	A sorority letter
SERIF	Flourish on a letter
PHI	Letter on a key
GIMEL	Letter on a dreidel
SERIF	Line on a letter
ZETA	Letter on a sweater
ZIPCODE	Number on a letter
GRADE	Letter on a transcript

KAPPA	Letter on a key
WRITE	Work on a letter
POSTMARK	Stamp on a letter
MINTMARK	Letter on a coin
ENC	Letters on a letter
SHIN	Letter on a dreidel
NUN	Letter on a dreidel
PHI	Letter on a key.

PPS	Afterthought on a letter.
SIRS	Salutation on a letter.
DEAR	Salutation on a letter.
SERIF	Stroke on a letter
STAMP	Item on a letter.
BETA	Letter on a key
ZIP	Code on a letter
ZIPCODE	Numbers on a letter

EMAIL	Letter on a screen
RSVP	Letters on a letter
ATTN	Abbr. on a letter
ATTN	Abbr. on a business letter
ENCL	Abbr. on a business letter
DOT	Final touch on a letter?
UNSEAL	Use a letter opener on
SLIT	Use a letter opener on

ENC	Abbr. on a cover letter
SWAK	Abbr. on a love letter
SWAK	Letters on a love letter
SLITS	Uses a letter opener on
ZIP	... code (number on a letter)