Shock, dismay (5)
I believe the answer is:
appal
This clue is a double definition.
'shock' is the first definition.
(I know that shock is a kind of appal)
'dismay' is the second definition.
(I know that dismay can be written as appal)
(Other definitions for appal that I've seen before include "Greatly dismay" , "Fill with horror" , "Cause to be unpleasantly surprised" , "Dismay, horrify" , "Petrify" .)