It detects blue-pencil reportedly (6)

I believe the answer is:

sensor

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

'it detects' is the definition.
The definition suggests a singular noun which matches the answer.

'blue-pencil reportedly' is the wordplay.
'blue-pencil' becomes 'censor' (I've seen this before).
'reportedly' shows a homophone (sound like).
'censor' is a homophone of 'SENSOR'.

Can you help me to learn more?

(Other definitions for sensor that I've seen before include "One detects" , "Detection device" , "device to detect change?" , "Detector" , "that could provide a smokescreen" .)

I've seen this clue in The Hindu.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.