Large number Hun eliminated, inspiring a terror (5)
I believe the answer is:
dread
'terror' is the definition.
(both can mean a feeling of angst)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for dread that I've seen before include "Fear - dire" , "Be afraid of - anxiety" , "Show horror" , "Trepidation" , "Deep fear" .)