One is somehow not quite so silent (9)

I believe the answer is:

noiseless

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

'quite so silent' is the definition.
'noiseless' can be an answer for 'silent' (I've seen this before). I'm not sure about the 'quite so' bit.

'one is somehow not' is the wordplay.
'somehow' indicates an anagram.
'not' becomes 'less' (I've seen this in other clues).
'one'+'is'='oneis'
'oneis' with letters rearranged gives 'noise'.
'noise'+'less'='NOISELESS'

Can you help me to learn more?

(Other definitions for noiseless that I've seen before include "Mum" , "Lionesses (anag) - making no sound" , "unsound?" , "with a silencer?" , "Silent, quiet" .)

I've seen this clue in The Daily Express.

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