Possible Clues:

• Large light brick
• Building brick which might keep the wind out?
• Easy job coming to stop in building unit
• Brick made of cinders, sand and cement
• Material for building split windscreen?
• Variety of light brick
• Easy thing to stop getting building material
• Piece of cake with jam that forms part of a build-up?
• Used for building a wind break?
• Lightweight brick