Possible Clues:

• Parvenu bitter after periods of success
• One suddenly raised to importance
• Johnny-come-lately
• Arrogant type on horseback, last to cross cutting
• Person risen to high position, arrogant with it
• Person newly risen from the ranks and arrogant
• Up to the beginning at the end without a background
• Perhaps T-rats had a sudden rise
• Good person in university role seen as status seeker?
• Parvenu is put out over celebrity