To argue in such a way is a scandal (7)

I believe the answer is:

outrage

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

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

'to argue in such a way' is the wordplay.
'to argue' can be anagrammed to 'OUTRAGE'.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for outrage that I've seen before include "scandalous!" , "Violate" , "To argue about act that shocks public opinion" , "Profound indignation" , "Great anger" .)

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

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