Electronic noise (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
bleep
'electronic noise' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for bleep that I've seen before include "High-pitched sound" , "Page" , "Noise of alarm" , "(Alarm) pulse" , "Short high tone as a signal or warning" .)