Crossword Genius

One of two is confused here admitting ne plus ultra? (6)

Ross

I believe the answer is:

either

(Other definitions for either that I've seen before include "offered a choice" , "No matter which (of two)" , "One of two alternatives" , "Choice of two" , "Her tie (anag.)" .)

I've seen this clue in The Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.