Desiree's passion (3)

I believe the answer is:

ire

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

'passion' is the definition.
(ire is passionate anger)

'desiree's' is the wordplay.
'IRE' is hidden within the letters.
However, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for ire that I've seen before include "heat" , "Anger, annoyance" , "Irritation, anger" , "Fury" , "passion" .)

I've seen this clue in the Evening Standard.

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