Very shocked (6)
I believe the answer is:
aghast
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">very shocked</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aghast that I've seen before include "Horrified, appalled" , "Appalled, filled with consternation" , "Filled with fear and consternation" , "Stunned" , "Deeply dismayed" .)