Related Clues:

• Distinct stage
• Segment
• Part of growing up
• Moon stage
• Terrible twos, e.g.
• New moon, e.g.
• Full moon, e.g.
• Developmental stage
• Full moon, for one
• Part of the plan
• Thumbsucking, e.g.
• Aspect of development
• Development stage
• Cycle part
• ___ in (introduce gradually)