Noted underground adventurer (5)

I believe the answer is:

alice

(Other definitions for alice that I've seen before include "Celia changes into a different girl" , "Girl famed for Wonderland adventures" , "Girl famous for entering Wonderland" , "woman" , "Girl in literary Wonderland" .)

I've seen this clue in The New York 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.