Taken by surprise (8)
I believe the answer is:
startled
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">taken by surprise</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for startled that I've seen before include "Surprised with fright" , "Stunned, shocked" , "Suddenly alarmed" , "Taken by surprise" , "Frightened or suprised suddenly" .)