Exceptions or anomaly to rile us (8)

I believe the answer is:

outliers

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

'exceptions' is the definition.
(I've seen this in another clue)

'anomaly to rile us' is the wordplay.
'to rile us' anagrams to 'OUTLIERS'.
But, I'm not sure how this is indicated.

'or' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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