### Clue: Lunatic another to box current champion booed (8)
### Answer: ANTIHERO 
 ### Explanation: Definition: champion booed
 **Anagram of**(Lunatic) ANOTHER **containing**(to box) I(symbol for electrical current in physics).
Defn: The central character in a story, who one might call a champion, but who lacks the moral qualities associated with a conventional hero, and therefore might be booed for that.  An example is found in 14 across.