Related Clues:

• Flex, though copper is the more likely material
• Map one may be as thick as?
• What's used for writing in space between lines of print
• Blueprint of factory nearing completion
• Blueprint for a tailless aircraft
• Metal - van
• Soft, heavy metal
• Scheme - plot
• Scheme - map
• Metal - van - go ahead
• Map - scheme
• Metal - van - important role
• Be ahead of - guide
• Element (Pb)
• 1 down, symbol Pb