Possible Clues:

• Kite Abel made up from an early plastic
• 'Type of hard plastic, used in old telephones (8)'
• Produce cakes etc with low fat content in plastic
• A plastic once used for telephones etc.
• Plastic - a mere snack for Spooner
• Use heat to harden plastic tile in resin-based material
• Old plastic cards in black and cream
• Collectible plastic jewelry
• Perhaps brown, and fired, first of early plastic
• Line, half of it and not much of that, forms resistant stuff