The only way I see it is by sending one of your player in a d-league for a week.
You couldn't use him in games, he would get 30 minutes of playing time, affecting game shape and whatever training regimen you have for the week.
This way if you really can't play a rookie in you league or the cup because he doesn't have enough skill, you settle for him getting no more than 30 minutes of playing time away from the club.
"Air is beautiful, yet you cannot see it. It's soft, yet you cannot touch it. Air is a little like my brain." - Jean-Claude Van Damme