Electronic communication has upset me - trouble follows (1-4)
'electronic communication' is the definition.
(email is a kind of electronic communication)
'upset me trouble follows' is the wordplay.
'upset' says the letters should be written backwards.
'trouble' becomes 'ail' (synonyms).
'follows' says to put letters next to each other.
'me' backwards is 'em'.
'em'+'ail'='EMAIL'
'has' acts as a link.
(Other definitions for email that I've seen before include "Post" , "Message sent via computer" , "Digital message" , "Spam perhaps" , "Electronic message" .)
'electronic communication' is the definition.
(I've seen this before)
'upset me trouble follows' is the wordplay.
'upset' is a reversal indicator.
'trouble' becomes 'ail' (synonyms).
'follows' says to put letters next to each other.
'me' written backwards gives 'em'.
'em'+'ail'='E-MAIL'
'has' acts as a link.
(Other definitions for e-mail that I've seen before include "Online message" , "Transmission of correspondence via internet" , "Online correspondence" , "Electronic message" , "Online post" .)