For something regular see Labour (9)

I believe the answer is:

clockwork

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'for something regular' is the definition.
I can't judge whether this definition defines the answer.

'see labour' is the wordplay.
'see' becomes 'clock' (clock can mean to see or notice).
'labour' becomes 'work' (I've seen this before).
'clock'+'work'='CLOCKWORK'

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(Other definitions for clockwork that I've seen before include "Timepiece's mechanism" , "Machinery of wind-up timepiece" , "It is proverbially regular" .)

I've seen this clue in The Sun.

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