Answer:

cusp

Answer	Crossword Clue
CUSP	Horn of a crescent moon
CUSP	Brink
CUSP	Edge

CUSP	Zodiacal border
CUSP	Tip of a crescent
CUSP	Beginning of a house?
CUSP	Astrological border
CUSP	Zodiacal divider
CUSP	January 19th, e.g., astrologically
CUSP	Crescent's tip
CUSP	Pointed end

CUSP	Where some signs change
CUSP	Astrological delineation
CUSP	Astrological edge
CUSP	Zodiac transition point
CUSP	Either horn of a crescent moon
CUSP	Person born on a sign's first day
CUSP	November 21st, say, astrologically
CUSP	Tooth point

CUSP	Where astrological signs meet
CUSP	The point where two curves meet
CUSP	Cutting edge
CUSP	Border in the stars?
CUSP	Sign-changing area
CUSP	Zodiacal boundary
CUSP	Astrological marker
CUSP	Transitional time

CUSP	Border line
CUSP	Tooth tip
CUSP	Crescent tip
CUSP	Beginning point
CUSP	Point of a crescent
CUSP	Transition point, in astrology
CUSP	Very edge
CUSP	Zodiacal edge

CUSP	Crescent point
CUSP	Transition point
CUSP	Edge of a zodiac sign
CUSP	Astrological transition point
CUSP	Canine component