Continued circulating without being spotted (9)

I believe the answer is:

unnoticed

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'without being spotted' is the definition.
I can't judge whether this defines the answer.

'continued circulating' is the wordplay.
'circulating' indicates an anagram.
'continued' is an anagram of 'UNNOTICED'.

Can you help me to learn more?

(Other definitions for unnoticed that I've seen before include "Not spotted" , "Overlooked" , "without attracting attention" , "ignored" , "Continued to be not observed" .)

I've seen this clue in The Times.

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