Stemming a disconcerting attraction (9)

I believe the answer is:

magnetism

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'attraction' is the definition.
(I know that magnetism is a type of attraction)

'stemming a disconcerting' is the wordplay.
'stemming a' can be anagrammed to 'MAGNETISM'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for magnetism that I've seen before include "Attractive force" , "Attraction" , "Drawing power" , "Charisma" .)

I've seen this clue in The Globe and Mail.

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