___, liquid, gas (5)

I believe the answer is:

solid

(Other definitions for solid that I've seen before include "continuous" , "Firm - three-dimensional" , "Firm - sound - reliable" , "Hard and compact" , "Substantial - having three dimensions" .)

I've seen this clue in the USA Today.

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.