I didn't think either were good clues.
An "outer" is a region on an archery target, but there are other regions as well. so why pick this one?
There was much discussion and complaint about the other one last week. The best explanation (not mine!) was that if you take the P(arking) off CAMP. you get CAM - i.e. it's "endless". This would of course work for any word ending in P, and it seems a bit feeble.