Sauce for a caprese sandwich (5)

I believe the answer is:

pesto

(Other definitions for pesto that I've seen before include "Pasta sauce based on basil" , "Sauce made of basil and cheese" , "Saucy work" , "Sauce of basil, pine nuts, etc" , "Basic sauce" .)

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.