Possible Clues:

• Commonplace
• Stop including one pound that's most common
• Common clergyman in unimpressive books
• The rule
• It's commonly found to stop a student entering
• Extensive block accommodating almost everyone
• Stop including almost everything that is fairly common
• Stop drinking endless beer- it's common
• Usual hamper containing nearly everything
• General's attendant penning note before going over the top