Related Clues:

• Prototype detail, briefly
• ___ sheet
• Academic field
• Surface measure
• Metropolitan ___
• Project detail, for short
• Something risky to work on
• Inner space
• What pi may be used to find
• On __ (without a buyer)
• Paint-store calculation
• Part of BART
• ___ 51
• It's found side by side
• Geographical statistic