Frozen' princess with a palindromic name (4)

I believe the answer is:

anna

(Other definitions for anna that I've seen before include "___ Pavlova, Russian dancer, d. 1931" , "Miss Karenina" , "was of very small account in India" , "Unit of length" , "Palindromic girl's name" .)

I've seen this clue in The Washington Post.

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