Possible Clues:

• Editorial slip-up
• This shows mistake was made — “maturer” is wrong
• Mistake made by a bishop in not speaking up
• Slip where shopper gets in oriental drink?
• Maturer when going wrong, making mistake
• Slip put right near the back of a book
• Printing mistake, rare, unsettled corporation
• Published correction
• Printed slip
• English rogue involved in odd mistake