One won't transmit current note about music director (3-9)

I believe the answer is:

non-conductor

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'one won't transmit current' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'note about music director' is the wordplay.
'note' becomes 'n' (abbreviation).
'about' becomes 'on' (as in a book 'on' a certain topic).
'music director' becomes 'conductor' (synonyms).
'n'+'on'+'conductor'='NON-CONDUCTOR'

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I've seen this clue in The Telegraph.

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