The murmuring sounds of some insects (6)

I believe the answer is:

drones

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'some insects' is the definition.
(drone is a kind of insect)

I can't explain the remainder of the clue.

(Other definitions for drones that I've seen before include "Male bees or idlers" , "Bass pipes of bagpipes" , "Aircraft operated by remote control" , "Male honey-bees" , "Honeybees that mate with the queen" .)

I've seen this clue in the Sydney Morning Herald.

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