Transport French crew (7)
I believe the answer is:
freight
'transport' is the definition.
(freight is a kind of transport)
'french crew' is the wordplay.
'french' becomes 'fr'.
'crew' becomes 'eight' (I've seen this before).
'fr'+'eight'='FREIGHT'
(Other definitions for freight that I've seen before include "Cargo, goods transported" , "Consignment" , "Goods carried by a large vehicle" , "Something carried" , "Commercial transport" .)