Emphasise disgust at retiree (9)

I believe the answer is:

reiterate

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

'emphasise' is the definition.
(I've seen this before)

'disgust at retiree' is the wordplay.
'at retiree' can be anagrammed to 'REITERATE'.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for reiterate that I've seen before include "Emphasise" , "State again" , "Belabour" , "Say it again for tire eater" , "Say again or repeatedly" .)

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

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