I of "The King and I" (4)
I believe the answer is:
'i of the king and i' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for anna that I've seen before include "and eleven, twenty four across heroine" , "- - Ford (TV)" , "worth very little in India" , "Book by Tolstoy" , "copper, once, in India" .)