"Busy" buzzer (3)

I believe the answer is:

bee

'busy buzzer' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for bee that I've seen before include "Honey producer" , "Creator of honey" , "Busy person" , "queen, perhaps" , "Useful insect" .)

I've seen this clue in the Penny Press, The New York Times, The Wall Street Journal and the Universal.

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