Apprehension (5)
'apprehension' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for dismay that I've seen before include "Concern and distress at something unexpected" , "Affright" , "Fill with apprehension" , "Feeling of despair in the face of obstacles" , "Horrified amazement" .)
(Other definitions for unease that I've seen before include "Anxiety, discontent" , "State of anxiety" , "State of worry and lack of confidence" , "Disquiet" , "Discomfort or apprehension" .)
'apprehension' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for angst that I've seen before include "Philosophical unease" , "Anxiety, guilty feeling" , "Anxious state" , "Feeling of anxiety or guilt" , "Strong feeling of anxiety/dread" .)
(Other definitions for alarm that I've seen before include "Security device" , "uneasiness" , "Warning sound or signal" , "Device sounding danger" , "Clock that wakes the sleeper" .)