Possible Clues:

• Adult stage of an insect
• Insect that's finally gotten its wings
• Idealised representation of current Chairman taking in government
• Stage of development where yours truly's in the past
• Adult
• Part of The Metamorphosis provides reading material in Number Ten
• Insect phase
• Cricket stage
• My light is green, perhaps, when my insect is perfect
• Last stage of setter's past?