### Clue: Conductor of opera with Mimi's new maiden replaced (9)
### Answer: TOSCANINI 
 ### Explanation: Definition: Conductor
  TOSCA(the opera by Puccini) NINI(from another Puccini opera, "Mimi" with "m",$$m$$aiden **replaced by**(replaced) "n",$$n$$ew – to fit, both "m"s are replaced, though not explicitly stated)
Defn:  Arturo, 1867-1957, Italian conductor.