Karenina's twelve pies? (4)

I believe the answer is:

anna

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'karenina's' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

(Other definitions for anna that I've seen before include "Old Indian coin - girl's name" , "-- Wintour, editor" , "Former one sixteenth of Rupee" , "worth very little in India" , "___ Pavlova, Russian dancer, d. 1931" .)

I've seen this clue in The Independent and The Times.

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