Wins ultramarathon, crushing ridicule (6)

I believe the answer is:

insult

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

'ridicule' is the definition.
(thesaurus)

'wins ultramarathon crushing' is the wordplay.
'INSULT' is hidden in amongst the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for insult that I've seen before include "Treat with abuse" , "Disrespectful remark" , "Abuse (someone)" , "Speak or act inm abusive way" , "Speak rudely or offensively about" .)

I've seen this clue in The Irish Times.

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