* Partly remember mud around Atlantic region (7,8)
I believe the answer is:
bermuda triangle
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for bermuda triangle that I've seen before include "mysterious place" , "Place where ships have been mysteriously lost" , "Area of mystery" , "notorious danger area?" , "associated with disappearing craft?" .)