Possible Clues:

• Sub-universe
• Charlie in riotous romcom is miniature model
• One reptile, abnormally large, stretching two metres, representative of something bigger
• Miniature example
• Society that epitomizes a larger one
• Thus one is up to describe reptile in millimetres as a small version
• Encapsulation in miniature of something larger
• Miniature encapsulation of something much larger
• Universe in miniature
• World in miniature