Possible Clues:

• Get rid of oil — a better is manufactured
• Alumnus's able to read, write and rub out
• Loiter and abet criminal in black out
• Get rid of well-read old boy to start with
• Blow to pieces
• 16 Destroy monastic type adopting new rite
• Efface, blot out
• Pupil no longer able to read or use eraser
• Put an end to bizarre rite described by monastic
• Root out heart of problem, and then do it again