### Clue: Innocent, maybe a thousand and eleven fled Pompeii (4)
### Answer: POPE 
 ### Explanation: Definition: Innocent, maybe
 [ M(Roman numeral for "a thousand") **plus**(and) II(2 x Roman numerals for "1";11;eleven) ] **deleted from**(fled) "Pompeii".
Defn: The title of a number of Catholic leaders who were named "Innocent".