Dread arrest (12)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
apprehension
This clue is a double definition.
'dread' is the first definition.
(I've seen this before)
'arrest' is the second definition.
('apprehension' can be a synonym of 'arrest')
(Other definitions for apprehension that I've seen before include "Arrest -- dread" , "Fear" , "butterflies" , "The catching" , "Understanding; anxiety" .)