Behaviour towards gold - that's a good one (9)

From Express Cryptic 20260611, 7D —

7D — Behaviour towards gold - that's a good one (9) — CONDUCTOR

  • Definition
    Definition found: 'that's a good one' — The definition is the playful phrase at the end — what is gold a famously good one of, in physics?
  • Wordplay
    Wordplay: Charade
  • Synonym
    Synonyms spotted: 'Behaviour' → CONDUCT
  • Abbreviation
    Abbreviations spotted: 'gold' → OR
  • Assembly
    CONDUCT + OR = CONDUCTOR

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