Possible Clues:

• Headmistress finds family member is capable of cross-dressing and play-acting
• Head lad's role in pantomime
• Standard report by one of the lads and one of the women taking lead in a pantomime
• Sounds like doctrine for the youth in Peter Pan for one
• Headmaster finds child for lead in Peter Pan
• Male pantomime hero played by actress
• Aladdin, for instance, is capital young fellow
• Something attracting interest by hiding nothing - cross-dressing player