Cautioned through learning (9)

I believe the answer is:

education

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

'learning' is the definition.
(I know that education is a type of learning)

'cautioned' is the wordplay.
'cautioned' anagrams to 'EDUCATION'.
But, I am not sure how the anagram is indicated.

'through' acts as a link.

Can you help me to learn more?

(Other definitions for education that I've seen before include "Culture" , "Series of activities that impart knowledge or skill" , "Essential for children" , "Cautioned (anag)" , "studies" .)

I've seen this clue in The Irish Independent.

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