Pointing out dictionary error (10)

I believe the answer is:

indicatory

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'pointing out dictionary error' is the definition.
I can't tell whether this definition defines the answer.

'dictionary error' is the wordplay.
'error' indicates an anagram.
'dictionary' anagrammed gives 'INDICATORY'.

Can you help me to learn more?

(Another definition for indicatory that I've seen is " sort of revealing".)

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

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