Heat from the fire (3)

I believe the answer is:

ire

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

'heat' is the definition.
(I've seen this in another clue)

'the fire' is the wordplay.
'IRE' is hidden within the letters.
However, I'm not sure how the hidden word is indicated.

'from' acts as a link.

Can you help me to learn more?

(Other definitions for ire that I've seen before include "Strong feeling" , "Anger among admirers" , "Fury" , "passionate feeling" , "Strong emotion" .)

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