Plot surprise (5)
I believe the answer is:
twist
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plot surprise</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for twist that I've seen before include "Bend, distort" , "Writhe" , "Strong thread" , "Bend round; dance" , "See 14" .)