Messages sent round in Parliament (1-4)

I believe the answer is:

e-mail

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'messages sent' is the definition.
I can't tell whether this defines the answer.

'round in parliament' is the wordplay.
'round' says the letters should be written in reverse.
'in' indicates a hidden word.
'liame' is hidden within 'parliament'.
'liame' written backwards gives 'E-MAIL'.

Can you help me to learn more?

(Other definitions for e-mail that I've seen before include "Electronic epistle" , "Electronic letter" , "Electronic communication" , "Online post" , "Online message" .)

I've seen this clue in The Sun.

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