Crossword Genius

One is curious (8)

Ross

I believe the answer is:

singular

I believe this is a double definition.

'one' is the first definition.
('singular' can be a synonym of 'one')

'curious' is the second definition.
('singular' can be a synonym of 'curious')

'is' is the link.

(Other definitions for singular that I've seen before include "Strange - unique" , "Unusual - not plural" , "number" , "One of a kind" , "Extraordinary - conspicuous - sole" .)

I've seen this clue in the Evening Standard.
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