Crossword Genius

What computer enthusiasts do to generate number (5)

Ross

I believe the answer is:

digit

'number' is the definition.
(I know that digit is a type of integer)

I cannot understand how the rest of the clue works.

(Other definitions for digit that I've seen before include "one of several at hand" , "A small number" , "using 0 or 1 for example" , "zero, one, two, three, four, five, six, seven, eight, or nine" , "E.g. toe" .)

I've seen this clue in The Guardian.
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