Possible Clues:

• Over-assertive newcomer
• Promotes bitter social-climber
• Have trats just risen?
• Trats without a background?
• Social climber mounted Ernst's last two paintings
• Person recently elevated and arrogant with it
• One who suddenly rises from nowhere to importance
• One has no background put around the heavenly body
• Arrogant arrival to high position
• That's without a background