Transmit from shed by minor thoroughfare (9)
I believe the answer is:
broadcast
'transmit' is the definition.
(I've seen this before)
'shed by minor thoroughfare' is the wordplay.
'shed' becomes 'cast' (I've seen this before).
'by' says to put letters next to each other.
'minor thoroughfare' becomes 'broad' (B road).
'cast' put after 'broad' is 'BROADCAST'.
'from' is the link.
(Other definitions for broadcast that I've seen before include "Transmission" , "Transmit by radio/TV" , "distributed by hand" , "Put on the air" , "Send out over the airwaves" .)