One of two the same (4)

I believe the answer is:

twin

(Other definitions for twin that I've seen before include "Balearic island" , "One of a matching pair" , "Identical or very similar" , "Duplicate copy" , "indistinguishable from the next?" .)

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.