Possible Clues:

• Maestro elected to double back on opera
• Arturo —, famous conductor
• Conductor contains oscillating current
• Important figure in the Met once in action, wandering round capital of Spain
• Arturo --, Italian conductor
• Longtime music director of La Scala and the New York Philharmonic
• Conductor of opera, at home in Northern Ireland
• Compound contains iodine for conductor
• Conductor of opera, name in Italy
• Maestro's opera popular in part of UK