There's opposition since rates were changed (10)

I believe the answer is:

resistance

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

'there's opposition' is the definition.
I can't judge whether this definition defines the answer.

'since rates were changed' is the wordplay.
'since rates' anagrams to 'RESISTANCE'.
But, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for resistance that I've seen before include "Violent opposition" , "Withstanding" , "French fighting group" , "defiance" , "Freedom fighters - it's measured in ohms" .)

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

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