Crossword Genius

One detects edit in audio (6)

Ross

I believe the answer is:

sensor

I'm a little stuck... Click here to teach me more about this clue!

'one detects' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for sensor that I've seen before include "Detecting device" , "A furtive look" , "One detects" , "device to detect change?" , "Device that reacts to stimulus from snores" .)

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