Before, had forgone the buzzer (3)
I believe the answer is:
bee
'buzzer' is the definition.
(something that buzzes)
'before had forgone' is the wordplay.
I cannot really understand how this works, but
'before' could be 'e' (I've seen this in other clues) and 'e' is located in the answer.
The remaining letters 'be' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'the' is the link.
Can you help me to learn more?
(Other definitions for bee that I've seen before include "Buzzing insect" , "A honey-maker" , "Insect that bumbles?" , "Hive worker" , "See 17" .)