Communication by letter to Lima, possibly (1-4)

I believe the answer is:

e-mail

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

'letter to lima possibly' is the wordplay.
'letter' becomes 'e'.
'possibly' is an anagram indicator.
'lima' anagrammed gives 'mail'.
'e'+'mail'='E-MAIL'

'by' is the link.

(Other definitions for e-mail that I've seen before include "Web post" , "Electronic missive" , "Modern method of communication via Internet" , "Online post" , "Transmission of correspondence via internet" .)

I've seen this clue in the Evening Standard.

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