Cargo of hemp isn't shifted (8)
I believe the answer is:
shipment
'cargo' is the definition.
('shipment' can be a synonym of 'cargo')
'hemp isn't shifted' is the wordplay.
'shifted' indicates an anagram.
'hemp'+'isnt'='hempisnt'
'hempisnt' is an anagram of 'SHIPMENT'.
'of' acts as a link.
(Other definitions for shipment that I've seen before include "22 [CARGO]" , "A consignment as for marine transport" , "Consignment of goods" , "load" .)