Every one of our flock is clipped, and we do get predators. Hawks, coyotes, owls, dogs, fox, raccoon, you name it. Not once, not ever have they *flown* away from predators, even when they were pullets and hadn't had their wings clipped yet. They run and hide, but don't fly. I don't think flight would help them evade predators any better.
Also, every time we've had a really terrible predator attack, it's been at night when they were roosting. The predators just picked them off the perches one by one.
I really don't believe that clipping wings gives them a survival advantage to predator attacks.