Crossword Genius

In legend, she became deadly, partly through sorcery? (5)

Ross

I believe the answer is:

medea

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

'sorcery?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'in legend she became deadly partly' is the wordplay.
'MEDEA' is hidden within the letters.
But, I am not sure how the hidden word is indicated.

'through' acts as a link.

Can you help me to learn more?

(Other definitions for medea that I've seen before include "Sorceress involved with Jason" , "Greek sorceress" , "Mythical wife who helped Jason get the Golden Fleece" , "Tragedy by Euripides" , "Sorceress who helped Jason get the Golden Fleece" .)

I've seen this clue in The Irish Times.
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