What does the cryptic crossword clue "Switch is originally on lead attached to old radiator (8)" mean?

This cryptic clue uses wordplay to arrive at the answer. Visit the page for progressive hints — definition, wordplay type, and a full step-by-step explanation.

Switch is originally on lead attached to old radiator (8)

Guardian Cryptic #29731 | 20 Across | 2025-06-26 flower

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