Crossword Genius

Does it say "Artificial Diamonds"? (6)

Ross

I believe the answer is:

notice

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'does it say' is the definition.
I can't judge whether this defines the answer.

'artificial diamonds?' is the wordplay.
'artificial' becomes 'not' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'diamonds?' becomes 'ice' (slang term for diamonds).
'not'+'ice'='NOTICE'

Can you help me to learn more?

(Other definitions for notice that I've seen before include "Poster; observe" , "Warning - proclamation" , "Public announcement" , "Announcement with information about a future event" , "Advance indication of intention to resign" .)

I've seen this clue in the Evening Standard.
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