Possible Clues:

• One of the 29 across sounds as if he might be in the zoo
• Worker with a mask
• Sounds as if one might be in a job at the zoo - a honey of a job
• Electronic warner without sound of alarm? I look to buzzers
• One whose workplace is all abuzz
• Person whose charges involve social workers
• One getting a constant buzz out of working in the colony?
• Sounds as if one might be a zoo employee in the insect house
• Person in charge of apiary
• He looks after the apiary