Put up with' altered to 'put up (9)

I believe the answer is:

tolerated

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

'put up with' is the definition.
(I've seen this before)

'altered to put up' is the wordplay.
'altered to' anagrams to 'TOLERATED'.
However, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for tolerated that I've seen before include "Bore" , "Countenanced" , "accepted?" , "Borne" , "Endured; allowed" .)

I've seen this clue in The Irish Independent.

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