Middle 2 from 4 (x 2) for shipment (7)
I believe the answer is:
freight
'shipment' is the definition.
('freight' can be a synonym of 'shipment')
'middle 2 from 4 x 2' is the wordplay.
'middle r' becomes 'fr' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'from' means one lot of letters go next to another.
'4 x r' becomes 'eight' (I've seen this before).
'fr'+'eight'='FREIGHT'
'for' acts as a link.
(Other definitions for freight that I've seen before include "Consignment" , "Transport of bulk goods" , "Charge for carrying" , "Cargo, goods transported" , "Commercial transport" .)