The word "ein" is a German indefinite article, which translates to "a" or "an" in English. In this context, it indicates one unspecified person or thing. The clue "A, in Wiesbaden" implies that the word "ein" is related to something or someone located in the city of Wiesbaden.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: German "a". Explanations are generated by AI and may be inaccurate.