Possible Clues:

• Idealized view of a parent, say, in psychology
• Fully developed insect
• Onetime pupa
• Final stage of an insect's development
• Final stage of (insect) development
• My light seems to be green to make the 19 across perfect
• Final stage of insect life
• Mine is the green light for the perfect insect
• Picture of saint
• One mile a journey? That's as far as a butterfly can go