Possible Clues:

• Most unusual for the Academician to get a break from work
• Underdone, for the most part
• Very unusual sort of a holiday for an Academician
• That's a most unusual sort of holiday for an Academician
• How very unusual to be such a starer
• What a most unusual break for an Academician to take!
• Least common, most unusual
• That's the most bloody holiday an artist might have
• Like AB negative, of all major blood types
• Most scarce or infrequent