It’s good form, you say, pet (4)

I believe the answer is:

peke

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'pet' is the definition.
The definition and answer can be both animals as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for peke that I've seen before include "Small breed of dog" , "5 [MANS BEST FRIEND]" , "Sort of lapdog" , "Little dog" , "Snub-nosed lap-dog (colloq.)" .)

I've seen this clue in the Evening Standard.

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