There is no variation in any case (3,3,4)

I believe the answer is:

all the same

'in any case' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for all the same that I've seen before include "Despite anything to the contrary" , "like clones?" , "in spite of this" , "lacking in variety" , "even so" .)

I've seen this clue in The Times.

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