Electronic message (1-4)

I think it could be either:

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1-4

'electronic message' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for email that I've seen before include "Spam perhaps" , "Electronic communication" , "Internet-borne communication" , "Message sent via computer" , "Send one online" .)

I've seen this clue in The Telegraph, the Sydney Morning Herald, the Newsday, the Evening Standard, The Mirror and The Times.

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