Mother trapped in lie about messages (1-4)
I believe the answer is:
'mother trapped in lie about messages' is the definition.
I can't tell whether this defines the answer.
'mother trapped in lie' is the wordplay.
I cannot quite see how this works, but
'mother' could be 'ma' (Ma is another word for mother or mum) and 'ma' is found in the answer.
an anagram of 'lie' is 'eil' which is present in the left over letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for e-mail that I've seen before include "Electronic communication" , "Means of communication" , "Online message" , "Modern method of communication via Internet" , "Send a message" .)