Answer:

starchy

Answer	Crossword Clue
STARCHY	Stiff and formal
STARCHY	High-carb, maybe
STARCHY	Rigidly formal

STARCHY	Like pasta
STARCHY	Like tapioca
STARCHY	Like rice and potatoes
STARCHY	Like legumes
STARCHY	Like poi.
STARCHY	Glutinous.
STARCHY	Designating certain foods.
STARCHY	Formal.

STARCHY	Stiffly formal
STARCHY	Formal
STARCHY	Stiff
STARCHY	Like taro or sago
STARCHY	Like some newly laundered shirts
STARCHY	Like potatoes