Global outbreak has Democrat fleeing in terror (5)
I believe the answer is:
panic
'terror' is the definition.
(synonyms)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for panic that I've seen before include "displaying great fear" , "Have kittens" , "Horror" , "Lose the head, yield to fear" , "Mass fear" .)