Can enter amazing year, a notable one (9)

I believe the answer is:

centenary

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

'a notable one' is the definition.
Although both the answer and definition are adjectives, I can't see how they can define each other.

'can enter amazing year' is the wordplay.
'amazing' indicates an anagram.
'year' becomes 'y'.
'can'+'enter'='canenter'
'canenter' is an anagram of 'centenar'.
'centenar'+'y'='CENTENARY'

Can you help me to learn more?

(Other definitions for centenary that I've seen before include "celebration" , "special occasion" , "... so celebrating this next month" , "One hundredth anniversary" , "100th anniversary" .)

I've seen this clue in The Guardian.

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