Means of transport in channel (7)
I believe the answer is:
vehicle
This clue is a double definition.
'means of transport' is the first definition.
(I've seen this before)
'channel' is the second definition.
(thesaurus)
'in' acts as a link.
(Other definitions for vehicle that I've seen before include "wheels" , "Means of conveyance" , "Conveyance for transporting passengers or goods" , "Eg, car" , "Medium" .)