Honey producer (3)
I believe the answer is:
bee
'honey producer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bee that I've seen before include "Hairy-bodied insect" , "In one's bonnet, it's an obsessive idea" , "Insect that bumbles?" , "Social insect" , "Busy buzzer" .)