Possible Clues:

• Lord Protector of the Commonwealth from 1653 to 1658
• Protector has girl generously taken round Catholic city endlessly
• General memory not bad on musical chapter
• Five different heads of Commonwealth in convertible or limo fit for another
• Anti-royalist organ occupies old college storage space satisfactorily
• Commonwealth leader will cover more amended line
• King's enemy active, bringing soldiers round him, properly following order
• English Civil War leader