Fireman's fury (3)

I believe the answer is:

ire

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

'fury' is the definition.
(ire is intense rage)

'firemans' is the wordplay.
'IRE' is hidden in amongst the letters.
But, I'm uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for ire that I've seen before include "Choler" , "resentment" , "Strong emotion" , "Hot temper" , "Fury" .)

I've seen this clue in The Mirror.

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.