Farewell from a deity abroad (5)

I believe the answer is:

adieu

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'farewell' is the definition.
(adieu is a kind of farewell)

'a deity abroad' is the wordplay.
'deity abroad' becomes 'dieu' (I can't justify this - if you can you should give a lot more credence to this answer).
'a'+'dieu'='ADIEU'

'from' is the link.

Can you help me to learn more?

(Other definitions for adieu that I've seen before include "Cheerio" , "So long abroad" , "Farewell, adios" , "See you later" , "farewell message" .)

I've seen this clue in The Daily Express.

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