Electronic pioneer keeping in farmyard sounds (6)

I believe the answer is:

mooing

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'electronic pioneer keeping in farmyard sounds' is the definition.
I can't judge whether this definition defines the answer.

'keeping in farmyard sounds' is the wordplay.
'keeping' means one lot of letters goes inside another.
'farmyard sounds' becomes 'moog' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' going within 'moog' is 'MOOING'.

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I've seen this clue in The Guardian.

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