Possible Clues:

• New and arrogant arrival at high position
• Newcomer put out having to entertain celebrity
• Nouveau riche type
• A social climber must begin by riding
• Puts 18 down that's lately made it
• Newcomer�s got celebrity awfully put out
• Arrogant person new in high position
• T-rats without background?
• Early riser
• Person risen to high position and arrogant with it