Perhaps email in the latest style? (4-6)
I believe the answer is:
post-modern
'in the latest style?' is the definition.
(postmodernism is a contemporary style)
'perhaps email' is the wordplay.
I cannot really see how this works, but
'email' could be 'post' (email is a type of post or mail) and 'post' is found in the answer.
The remaining letters 'modern' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Another definition for post-modern that I've seen is " In a late 20th-century style".)