Crossword Genius

Not a minute without being seen? (7)

Ross

I believe the answer is:

unnoted

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

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

'not a minute' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'a minute' becomes 'noted' (I am not sure about this - if you are sure you should believe this answer much more).
'un'+'noted'='UNNOTED'

Can you help me to learn more?

(Other definitions for unnoted that I've seen before include "Not taken into account" , "Not recognised" .)

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