Mysterious situation (6)
I believe the answer is:
enigma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mysterious situation</span>' is the definition.<br/ >'<span class="explanation-format__answer">enigma</span>' can be an answer for '<span class="explanation-format__original">situation</span>'. I also know that 'mysterious' relates to this answer.<br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for enigma that I've seen before include "Mysteriously puzzling person or thing" , "Something mysterious and puzzling" , "'Puzzle, riddle (6)'" , "WW two Ger. code device; puzzle" , "Solution to mystery" .)