Broke the rod? Very unfair! (3,3)

I believe the answer is:

red hot

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 red hot that I've seen before include "with enthusiasm?" , "sort of poker" , "Sexy" , "Burning" , "Very keen" .)

I've seen this clue in the Sydney Morning Herald.

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.