The rad onc guys see their patients once a week during treatments I think and then periodically afterwards. It seems pretty clinical from the outside.
Radiology can be clinical, breast and IR, but definitely less so.
Radiation Oncology is like 50-75% of time spent in clinic between consults/follow-ups/on treatment visits, depending on how you set up your practice.
In terms of Radiology, you may have procedures as a radiologist, but the main ones that are really 'clinical' are Interventional Radiologists. Depending on the institution, you can have clinic as an IR doc.
The job market is an issue for Rad Onc (at least) currently. The overarching principle is that if you have no significant geographic boundaries you can find something worthwhile.