Crossword Genius

The point of an arrest (4)

Ross

I believe the answer is:

I believe this is a double definition.

'the point' is the first definition.
('stop' can be a synonym of 'point')

'an arrest' is the second definition.
(synonyms)

'of' is the link.

(Other definitions for stop that I've seen before include "Pack it in - bar", "Halt; finish", "End or pause", "Finished", "Put an end to".)