Crossword Genius

Invisible household hazard (5)

Ross

I believe the answer is:

radon

'invisible household hazard' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for radon that I've seen before include "A radioactive gas, symbol Rn" , "Colourless gas, atomic number 86" , "Element, symbol Rn" , "gets no reaction" , "Rare noble gas" .)

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.