Appalled, dismayed (6)
I believe the answer is:
aghast
This clue is a double definition.
'appalled' is the first definition.
(I know that appalled can be written as aghast)
'dismayed' is the second definition.
(I know that dismayed can be written as aghast)
(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" .)