Reg entangled with metal wire? (8)

I believe the answer is:

'wire?' is the definition.
('telegram' can be a synonym of 'wire')

'reg entangled with metal' is the wordplay.
'entangled with' indicates anagramming the letters.
'reg' with its letters anagrammed with 'metal' gives 'TELEGRAM'.

(Other definitions for telegram that I've seen before include "Message once sent by radio or electrical signals" , "Pre-1980s electronic message" , "Dispatch" , "(Old) type of message" , "cable" .)

I've seen this clue in The Globe and Mail.

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