Possible Clues:

• Wagner opera
• Wagnerian hero
• Folk hero made chips with silicon, say
• Opera by Wagner
• Legendary prince, say, after brief misdemeanour, really felt the heat?
• Warrior is retreating, say, having got very hot
• Warrior is brought back by nameless comrade — for burial, say
• Blockaded houses one day to get part of Wagner's ring
• Hero is about (say) to be electrocuted
• The hero of the first part of the German poem 'Nibelungenlied'