Data distributed with mail in an Adriatic region (8)

I believe the answer is:

dalmatia

I'm a little stuck... Click here to teach me more about this clue!

'an adriatic region' is the definition.
'dalmatia' can be an answer for 'region' (I have seen 'Balkan region' mean 'dalmatia' so perhaps 'region' could also mean 'dalmatia'). I am not sure about the 'an adriatic' bit.

'data distributed with mail' is the wordplay.
'distributed with' indicates anagramming the letters.
'data' mixed up with 'mail' gives 'DALMATIA'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for dalmatia that I've seen before include "part of SE Europe" , "Split region" , "Croats now live here" , "Croatian coast" , "part of former Yugoslavia" .)

I've seen this clue in The Times.

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