Related Clues:

• Unprofitable books about building
• Type of shed
• Roof needs clean top, but not edges
• Building clean toilet blocks
• Clothing article is slowly shed
• Sign a book inside outbuilding
• Slow movement around a shed
• Penthouse for thin couple, say
• Shed slowly filled with first of artefacts
• Basic shelter
• Slanted coverage?
• Inclined to get circular conservatory, maybe
• Abutting building
• Favour hut
• Slowly covering a rather unsightly building