Possible Clues:

• In current use
• Like Lionel trains
• Put in power and run this type of current about?
• Let Eric C play this sort of guitar?
• Emotionally charged, Circe let fly
• With 50-Across, South American shocker
• Singled out affluent, mostly, to be charged
• Shockingly exciting
• Gas alternative
• Choose the old force for the charge that's powerful