Like a novel mask (4)

I believe the answer is:

iron

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for iron that I've seen before include "Flatten; element" , "Smooth; element" , "Main component of steel" , "Smooth things" , "Metallic chemical element" .)

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.