1990-P Dime Rim Question

hyf88

Have some rare free time and going through a pile of things put aside for just such an occasion. What is this called on the rim where the edge reeding appears to be merging into it a bit? Is this just a very slightly mis-aligned obverse die or something going on with the collar?
many thanks for the help!

Oldhoopster

I believe this is a collar clash

Edit to add:
http://www.error-ref.com/collar-clash/

hyf88

That's it, thank you!