Appalled, dismayed (6)
I believe the answer is:
aghast
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">appalled</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that appalled can be written as aghast)</span><br/ ><br/ >'<span class="explanation-format__original">dismayed</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that dismayed can be written as aghast)</span><br/ ><br/ ></span>
(Other definitions for aghast that I've seen before include "Filled with horror or shock" , "Filled with terror" , "'Appalled, dismayed (6)'" , "Filled with fear and consternation" , "Thunderstruck" .)