Crossword Genius

Given one's pet treatment? (6)

Ross

I believe the answer is:

vetted

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

'given' is the definition.
The answer and definition can be both to do with social activities as well as being past participle verbs.
Maybe there's a link between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for vetted that I've seen before include "Examined carefully as animal doctor would" , "Investigated (someone) thoroughly" , "Thoroughly checked" , "Examined and passed" , "Security-checked" .)

I've seen this clue in the Evening Standard.
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