Curses Athos for misspelling (5)

I believe the answer is:

oaths

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

'curses' is the definition.
(I know this)

'athos for misspelling' is the wordplay.
'athos' anagrams to 'OATHS'.
However, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for oaths that I've seen before include "Curses - words of honour?" , "truths may be established by them" , "Profane expressions" , "Solemn vows" , "Imprecations" .)

I've seen this clue in the Evening Standard.

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