Crossword Genius

It picks up readings (6)

Ross

I believe the answer is:

sensor

'it picks up readings' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for sensor that I've seen before include "Detector" , "Detection device" , "A furtive look" , "that could provide a smokescreen" , "Detecting device" .)

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