Telegram (5)
'telegram' is the definition.
(I know that telegram can be written as wire)
This is all the clue.
(Other definitions for wire that I've seen before include "Metal fastener" , "Drawn-out metal" , "Flexible strands of metal" , "See 2" , "Strand of metal" .)
'telegram' is the definition.
(cable is a kind of telegram)
This is the entire clue.
(Other definitions for cable that I've seen before include "Liberal Democrat" , "Conductor for transmitting electric power" , "Telegram; wire rope" , "Telegraph" , "Naut. length; transmit" .)