Wire cable (8)

I believe the answer is:

This clue is a double definition.

'wire' is the first definition.
(I've seen this before)

'cable' is the second definition.
(I've seen this before)

(Other definitions for telegram that I've seen before include "Message transmitted by wire" , "It may bring word" , "Dispatch" , "Electric message" , "Message sent by wire" .)

I've seen this clue in The Telegraph.

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