Cats given restrictions, kept outside a BB (7)

I believe the answer is:

tabbies

'cats' is the definition.
(tabby is a kind of cat)

'restrictions kept outside a bb' is the wordplay.
'restrictions' becomes 'ties'.
'kept outside' means one lot of letters goes inside another.
'a'+'bb'='abb'
'ties' going around 'abb' is 'TABBIES'.

'given' is the link.

I've seen this clue in The Telegraph.

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