Related Clues:

• Spy's secret
• Principles
• Pig Latin, e.g.
• It may be packed
• Big bang creator
• See 67-Across
• Spy's writing, perhaps
• Starter's need
• Race
• Magazine article
• Secret message
• One if by land, two if by sea, etc.
• Kind of word
• Value system
• See 61-Down