Crossword Genius

Thick and heavy (5)

Ross

I believe the answer is:

dense

(Other definitions for dense that I've seen before include "Close-packed" , "Solid, thick" , "Closely-spaced" , "Not very bright" , "Stupid, crowded together" .)

I've seen this clue in The Telegraph.
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.