Related Clues:

• Officially accepted works
• Spy's writing, perhaps
• Secret message
• One if by land, two if by sea, etc.
• Kind of word
• Value system
• Works accepted as authentic
• Genetic or dress follower
• Rule
• Body of work
• Preparation that needs a cracker?
• Set of principles
• Church dignitary
• Word with bar or area
• Secret signal