Possible Clues:

• Vintner's need
• Raising agent up until now without a message centre
• Fungus still besetting a section
• Your food will get a rise out of it
• Fungus you once found by a stione
• Baker's raising agent
• Dough raising agent
• It's not used to make matzo
• It can raise your dough
• Substance used in brewing and baking