Indirect anger? (3)

I believe the answer is:

ire

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

'anger?' is the definition.
(thesaurus)

'indirect' is the wordplay.
'IRE' is hidden in amongst the letters.
However, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for ire that I've seen before include "Anger among admirers" , "Irritation, anger" , "Hot temper" , "'Anger, wrath (3)'" , "Anger, annoyance" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app