It was the correct call actually, just a poor explanation by the ref. You're not allowed to spike it like that unless the clock is running. Clock was stopped due to out of bounds and it wasn't going to start again until ball was snapped. Mental lapse by Winston and the coaching staff.
So technically, you would have to use the old kill the clock play, where the QB gets the snap and immediately throws to the sideline, 8 ft over the wide out’s head?