Crossword Genius

Make less dense (E, not I) (6)

Ross

I believe the answer is:

rarefy

(Other definitions for rarefy that I've seen before include "Make thinner" , "Make more refined" , "Make less solid; a ferry (anag.)" , "Fry are (anag.)" , "Refine" .)

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.