About 55% of blood (6)

I believe the answer is:

plasma

(Other definitions for plasma that I've seen before include "Yellow liquid in blood" , "Clear fluid portion of blood" , "Hot ionised gas" , "Colourless fluid in which blood cells are suspended" , "Colourless watery fluid of the blood" .)

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.