Answer:

ACORN

Answer	Crossword Clue
ACORN	Oak starter
ACORN	Type of squash
ACORN	Oak nut

ACORN	Squirrel stash
ACORN	Start of something big?
ACORN	Org. named in 2008 campaign mudslinging
ACORN	... squash
ACORN	Nut from an oak
ACORN	Nut with a "hat"
ACORN	Squirrel snack
ACORN	It's a tough nut to crack

ACORN	Nosh for a squirrel
ACORN	Squirrel's lunch
ACORN	Squirrel's cache
ACORN	Squirrel jackpot
ACORN	Oak's humble start
ACORN	Sort of squash
ACORN	Squirrel's treat
ACORN	Future oak

ACORN	Item in a squirrel's cache
ACORN	Nut with a cupule
ACORN	Tannin source
ACORN	Squirrel's find
ACORN	Nut in Vanderbilt's logo
ACORN	One in a chipmunk's hoard
ACORN	Oak, once
ACORN	Some kind of nut

ACORN	Kind of squash
ACORN	Whence the mighty oak
ACORN	Oak seed
ACORN	One fell on Chicken Little's head
ACORN	Oak-to-be
ACORN	Seed with real potential
ACORN	Find under an oak
ACORN	Future part of a stand, maybe

ACORN	Oak, in a nutshell
ACORN	Potential tree
ACORN	Snack for a blue jay
ACORN	Chicken Little's bit of falling sky, actually
ACORN	Part of a woodlands stash