Possible Clues:

• Modelling material
• Dish in city known for hard cheese adds revolutionary stuff to mould
• Manufacture of a prime cheap material
• During exam I start to make smart material for moulds
• Made of a dried pulp
• Start modelling a ripe peach using this substance
• Put out a cheap prime material for craftwork
• Paper medium for moulding items
• Pulp which can be painted when dry
• Light, hardmoulded material