Maybe, maybe not. Given events in the source material, I suspect it's easy to make a Clara if you're working with Doctor Who and not being careful. That, and she's a favorite fallback for the 'wave when someone's really trying to make Evil Daleks, along with Rusty and the Dizzy Doctor trio.
The fun part is that the Clara's tend to have an odd variant of Pinnochio syndrome. They know and are completely comfortable with being an android/clone/Dalek/catgirl/etc and are happily Fen, but they tend to agree that they're all the original that was scattered across the Doctors timeline to protect him. They're all waiting for the day he manages to crash into Fenspace.
The fun part is that the Clara's tend to have an odd variant of Pinnochio syndrome. They know and are completely comfortable with being an android/clone/Dalek/catgirl/etc and are happily Fen, but they tend to agree that they're all the original that was scattered across the Doctors timeline to protect him. They're all waiting for the day he manages to crash into Fenspace.