Related Clues:

• Part of book that may come out in the theatre
• Reference a couple of pages, then conclude with nine
• Bit at end of book that might be taken out?
• A very quiet finish before nine’s coda
• Arranged index on a couple of pages: it may be at back of book
• One may have to have it out in The Theatre or in a book
• Back pages
• Supplement at the end of a written work
• Useless human intestinal pouch
• In human anatomy, this is connected to the caecum
• Add one vote? It's no use to anybody
• Part of book removed from a theatregoer, perhaps?
• Extra information added at the end
• Codicil
• Father taken aback by pictures informally covering last supplement