Somehow censure it for a long time (9)

I believe the answer is:

centuries

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

'for a long time' is the definition.
I can't tell whether this defines the answer.

'somehow censure it' is the wordplay.
'somehow' is an anagram indicator.
'censure'+'it'='censureit'
'censureit' anagrammed gives 'CENTURIES'.

Can you help me to learn more?

(Other definitions for centuries that I've seen before include "Censure it for hundreds of years" , "Periods of 100 years" .)

I've seen this clue in The Mirror.

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