Italian port needs to age, no doubt (5)

I believe the answer is:

genoa

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

'italian port' is the definition.
(I've seen this before)

'to age no doubt' is the wordplay.
'age no' anagrams to 'GENOA'.
However, I am not clear how the anagram is indicated.

'needs' is the link.

Can you help me to learn more?

(Other definitions for genoa that I've seen before include "North Italian port" , "Type of rich fruit cake" , "Cake type; foresail" , "Italian city; sail" , "Seaport in northwestern Italy" .)

I've seen this clue in the Sydney Morning Herald.

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