Possible Clues:

• and 6 Down: Oscar's a wag, holding a brief rally near 9
• A reprobate, first in exams, joining my school
• The nifty Melodic Artisans, famed dance music group …
• French ___ (language overseer)
• Prep school, e.g
• School show doesn't start well!
• Place of study or training
• This writer's associated with a rebel school
• A revolting type going over yours truly's school
• Currently a scholar at Magdalen, or other place of learning