You can shoot the safe by banking the 7-ball to the center of the rail, but the better choice is not to let your opponent shoot at all. It is not an easy shot, but one that can be a high percentage shot if it is practiced. This is obviously a thin hit on the object ball. The extreme right english will spin the cue ball off the long rail for position. The right spin will also cause the cue ball to rebound off the rail at a wider than normal tangent.
Speed is very important.
It is a relatively soft shot that will allow the english time to take hold before it gets to the object ball.