Related Clues:

• Gown and mortarboard, or just mortarboard?
• Brainpan
• Avoid committing oneself to a run, blocking a bowler perhaps
• Principal confronting duds in mortarboard?
• Cap in which ditcher's mate carries articles here and there?
• Balmoral, perhaps, is top property
• In principle, state provides local drugs for one of those likely to end up on the stand!
• Dicky, eager, had this worn on top
• Hear about the aged spin bowler, perhaps
• A nut-case?
• Mental case
• Make grade, somehow, after he secures a cap, say
• Bowler, perhaps, with a hard edge played dismissing squad's tail-ender
• Protection for a nob
• Either piece of Crown Derby, for example