Having squares vetted (7)

I believe the answer is:

checked

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'vetted' is the definition.
The answer and definition can be both to do with perception as well as being past participle verbs.
Maybe they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for checked that I've seen before include "Restrained" , "Verified, passed inspection" , "Patterned with alternating squares of colour" .)

I've seen this clue in The Irish Independent.

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