Trade movement (7)
I believe the answer is:
traffic
This clue is a double definition.
'trade' is the first definition.
(trafficking is a kind of trading)
'movement' is the second definition.
(I know that traffic is a type of movement)
(Other definitions for traffic that I've seen before include "used cars" , "several vehicles" , "Flow of vehicles" , "Truck" , "Deal in, trade" .)