The sound of favourite music round the corner (4)

I believe the answer is:

plop

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'the sound' is the definition.
(plop is a kind of sound)

I can't explain the rest of the clue.

(Other definitions for plop that I've seen before include "Sound of a stone landing in water" , "Noise of a small object dropping into water" , "Report making little splash" , "Sound of a stone hitting water" , "Sound of object falling into water without a splash" .)

I've seen this clue in the Evening Standard.

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