Answer:

ivies

Answer	Crossword Clue
IVIES	Covers with creepers
IVIES	Penn and others
IVIES	Prestigious schools, colloquially

IVIES	Climbers
IVIES	Green climbers
IVIES	Creeping plants
IVIES	Wall climbers
IVIES	Prestigious colleges
IVIES	Cornell and Columbia, for two
IVIES	Dartmouth and Princeton, slangily
IVIES	Spreading plants

IVIES	Wall-climbing vines
IVIES	Brown and others
IVIES	Campus climbers
IVIES	Yale et al.
IVIES	Harvard and Yale
IVIES	Prestigious university octet
IVIES	Brown et al.
IVIES	Elite octet

IVIES	Prestigious octet
IVIES	Wrigley Field features
IVIES	Columbia et al.
IVIES	Harvard, Yale, Brown, etc.
IVIES	Wall coverings
IVIES	Yale wall climbers
IVIES	Prestigious schools, informally
IVIES	Climbing plants

IVIES	Harvard and Yale, e.g.
IVIES	High-tuition schools
IVIES	Harvard, Yale, Princeton, et al.
IVIES	Slow climbing plants
IVIES	College wall climbers
IVIES	Wall-climbing plants
IVIES	Building climbers
IVIES	Columbia and Cornell, e.g.

IVIES	Brown and Yale
IVIES	Yale and Princeton
IVIES	They climb the walls
IVIES	Penn et al.
IVIES	Brown is one of them