Crossword Genius

Number eighteen is well known (7)

Ross

I believe the answer is:

notable

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

'well known' is the definition.
(I've seen this before)

'number eighteen' is the wordplay.
'number' becomes 'no' (abbreviation for 'number').
'eighteen' becomes 'table' (I can't explain this - if you can you should give a lot more credence to this answer).
'no'+'table'='NOTABLE'

'is' is the link.

Can you help me to learn more?

(Other definitions for notable that I've seen before include "well known" , "Unusual" , "VIP" , "Celebrated" , "Famous or memorable" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app