I don't clip wings as a general practice, but I have done it. If a bird is regularly flying out then a clipped wing for a feather cycle is better than being dinner for a predator. I've usually done it with adolescents, those old enough to be in the open run with the adults but still light...
Depends on the breed/body type, and age. Young birds that haven't reached full weight can often fly better, some breeds that have smaller bodies/less weight can fly decently. If you need to keep it in, then covering the run with netting, or clipping the wings may help. Wing clipping works on...