No sewer entrance in sarn slums

"

zparks wrote:

The green circle is where Clarissa is supposed to be. If you have already saved her it will be an empty spot on the map with lots of shielded guards and 1 unique mob on it.

So that's what it marks. Thank you -- now that I know it's not related I can stop struggling with submitting a screenshot.

Edit: Ok, I think I fixed the problem -- by taking a closer look at the map. There is part of the area I didn't check yet. I'll probably find the entrance there.

Edit2: Found it. So the problem lies with my exploration skills, not the game. Decreasing map transparency was very helpful.