Crossword Genius

Writing is sometimes done on it (4)

Ross

I believe the answer is:

spec

(Other definitions for spec that I've seen before include "work to be done" , "Instructions" , "Required standard of workmanship" , "Detailed design (colloq.)" , "on which chance is taken" .)

I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.