Each live broadcast is without a carrier (7)
I believe the answer is:
vehicle
'carrier' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for vehicle that I've seen before include "Conveyance for transport" , "Conveyance of people or things" , "Means of conveyance" , "Eg, car" , "Structure for transporting" .)