Fear of arrest (12)
I believe the answer is:
apprehension
This clue is a double definition.
'fear' is the first definition.
(apprehension is a kind of fear)
'arrest' is the second definition.
('apprehension' can be a synonym of 'arrest')
'of' is the link.
(Other definitions for apprehension that I've seen before include "The catching" , "Anxious anticipation; understanding" , "Arrest -- dread" , "Fear" , "Fearful anticipation" .)