Pass left and right, initially making arrest (6)
I believe the answer is:
collar
'arrest' is the definition.
('collar' can be a synonym of 'arrest')
'pass left and right initially' is the wordplay.
'pass' becomes 'col' (col is a kind of pass**).
'initially' says to take the initial letters.
The initial letters of 'left and right' is 'lar'.
'col'+'lar'='COLLAR'
'making' acts as a link.
(Other definitions for collar that I've seen before include "One with "dog" identifies a clergyman" , "Neck of shirt" , "Nick" , "Apprehend (someone)" , "Seize; cut of bacon" .)