Crossword Genius

Increase is noted on gold tooth (7)

Ross

I believe the answer is:

incisor

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

'gold tooth' is the definition.
(thesaurus)

'increase is noted on' is the wordplay.
I cannot quite understand how this works, but
'is' is found in the answer.
'on' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for incisor that I've seen before include "oral equipment" , "Ivory perhaps" , "Canine" , "something with bite" , "Narrow-edged tooth" .)

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