Related Clues:

• Building regulations
• Cryptographer's study
• See 86-Down
• Morse or area
• Word with bar or airport
• Write a program
• Secret writing
• Body of law
• See 11 Down
• It takes brains to crack it
• Word with fire or area
• ___ red
• 'The Da Vinci --'
• Morse ___
• Computer programmer's work