Crossword Genius

Man is one (4)

Ross

I believe the answer is:

isle

'man is one' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for isle that I've seen before include "eg Man, Ely" , "Land amid water" , "Small area of ground" , "Lies (anag)" , "Small area of land in water" .)

I've seen this clue in The New York Times.
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