Buzzer to get service in dump (3-3)
I believe the answer is:
fly-tip
'dump' is the definition.
(fly-tipping is illegally dumping waste)
'buzzer to get service' is the wordplay.
'buzzer' becomes 'fly' (flies buzz around).
'to get' means one lot of letters go next to another.
'service' becomes 'tip' (service charge).
'fly'+'tip'='FLY-TIP'
'in' acts as a link.
(Other definitions for fly-tip that I've seen before include "Dump rubbish illegally" , "Illegally dump waste" .)