Answer:

wheat

Answer	Crossword Clue
WHEAT	Onetime penny depiction
WHEAT	Plains crop
WHEAT	Grain with gluten

WHEAT	Pasta's past?
WHEAT	Amber waves of grain
WHEAT	Deli choice
WHEAT	Sandwich choice
WHEAT	It may be whole or cracked
WHEAT	Bulgur or emmer
WHEAT	Deli bread
WHEAT	Bread choice

WHEAT	Pasta grain
WHEAT	Gluten-rich grain
WHEAT	Thresher grain
WHEAT	Grass eaten by humans
WHEAT	Bread grain
WHEAT	Grain found in the "breakfast of champions"
WHEAT	Grain that might be cracked
WHEAT	Gluten source

WHEAT	Cereal grain
WHEAT	Farm product
WHEAT	Kansas crop
WHEAT	Bread ingredient
WHEAT	Bran source
WHEAT	Kansas product
WHEAT	"Amber waves of grain"
WHEAT	Depiction on the back of old pennies

WHEAT	Semolina source
WHEAT	World's most important crop.
WHEAT	It was shipped to India after Congressional battle.
WHEAT	Contents of an elevator.
WHEAT	Golden grain.
WHEAT	Mid-Western staple.
WHEAT	Important crop.
WHEAT	Product of North Dakota.

WHEAT	Staff of life in a way.
WHEAT	Cereal grass.
WHEAT	Spelt
WHEAT	Certain U. S. belt
WHEAT	U.S. export