Crossword Genius

Mark II (5)

Ross

I believe the answer is:

twain

I believe this is a double definition.

'mark' is the first definition.
(Mark Twain)

'ii' is the second definition.
(twain is a kind of ii)

(Other definitions for twain that I've seen before include "Archaic word for two" , "A number in company" , "II?" , "Two items of the same kind and well-known author" , "Pair (archaic) - US novelist, Mark" .)

I've seen this clue in The Globe and Mail.
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