A criminal pursuit, something shady with opening of cocaine lines (3,3,3)
I believe the answer is:
hue and cry
Here is my best explanation:
'a criminal pursuit' is the definition.
(call to assist in apprehending a criminal)
'something shady with opening of cocaine lines' is the subsidiary indication.
'something shady' becomes 'hue' (a shade).
'with' becomes 'and'.
'opening of' says to take the initial letters.
'lines' becomes 'ry' (abbreviation for railway).
The first letter of 'cocaine' is 'c'.
(Other definitions for hue and cry that I've seen before include "Loud and persistent clamour", "Public pursuit", "Stir", "Hullabaloo", "Loud public clamour", "major complaint", "Pursuit", "Loud clamour - pursuit of criminal", "Public outcry" and "Fuss".)