Limits to setting up Tiberius' clubs (4)

I believe the answer is:

suit

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'clubs' is the definition.
(clubs is an example of a card suit)

I can't explain the rest of the clue.

(Other definitions for suit that I've seen before include "Formal wear (for court action?)" , "diamonds possibly" , "Set of garments" , "Diamonds, for example" , "Eg, hearts or clubs" .)

I've seen this clue in the Irish Times.

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