Little time lost amongst all that apprehension (5)
'apprehension' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for angst that I've seen before include "Feeling of guilt or remorse", "Acute, but unspecific, feeling of anxiety", "Oppressive feeling of worry, guilt", "Apprehension", "General feeling of dread".)