Answer:

mold

Answer	Crossword Clue
MOLD	Mildew, for one
MOLD	Bundt cake form
MOLD	Shape

MOLD	Foundry form
MOLD	Sign of disuse
MOLD	Jell-O ring
MOLD	Play with clay
MOLD	Common allergen
MOLD	Ventilation-system problem
MOLD	Work with clay
MOLD	Jell-O shaper

MOLD	Form
MOLD	Sake brewer's need
MOLD	Bread concern
MOLD	Penicillin source
MOLD	Gelatin container, sometimes
MOLD	Casting requirement?
MOLD	Gelatin dish
MOLD	Fungus growth

MOLD	Refrigerator growth
MOLD	Fungus among us
MOLD	It turns bread blue
MOLD	Prototype
MOLD	Refrigerator "science experiment"
MOLD	Unwanted fungus in the fridge
MOLD	(Puzzle by Ed Early) Jell-O making need
MOLD	Bread spoiler

MOLD	Shaping aid
MOLD	It puts the blue in blue cheese
MOLD	Gelatin shaper
MOLD	Hollow form
MOLD	Blue-cheese feature
MOLD	Casting form
MOLD	Foundry frame
MOLD	Factory form to fill

MOLD	Green growth on old bread
MOLD	Penicillin producer
MOLD	Bread growth
MOLD	Knead into shape.
MOLD	Source of penicillin.