Alarm, apprehension (6)
I believe the answer is:
dismay
I believe this clue is a double definition.
'alarm' is the first definition.
(I know that alarm can be written as dismay)
'apprehension' is the second definition.
(I've seen this before)
(Other definitions for dismay that I've seen before include "Disappointment" , "Concern and distress at something unexpected" , "trouble" , "unnerve" , "Feeling of despair in the face of obstacles" .)