Crossword Genius

First digit of this puzzle's subject, whose next four digits are the number of rows and then columns of the grid (5)

Ross

I believe the answer is:

three

(Other definitions for three that I've seen before include "So many 12s today" , "... number of his "Steps to Heaven"" , "Number of Furies or Norns" , "Number that's a crowd" , "A crowd, you might say" .)

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