Buzzers at Brentford (4)
I believe the answer is:
bees
'buzzers' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for bees that I've seen before include "Buzzers" , "Honeymakers" , "Busy insects" , "They are kept in an apiary" , "Social insects" .)