Even when wired correctly it can still shock (8)
I believe the answer is:
telegram
'can still shock' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for telegram that I've seen before include "Pre-1980s electronic message" , "Message sent by wire" , "Message transmitted by wire" , "cable" , "Dispatch" .)