Crossword Genius

Relating to the bottom layer (5)

Ross

I believe the answer is:

basal

(Other definitions for basal that I've seen before include "forming a foundation" , "Fundamental" , "bottom layer perhaps" , "At the lowest level" .)

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.