Farewell for a Continental deity (5)

I believe the answer is:

adieu

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

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

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

'for' acts as a link.

Can you help me to learn more?

(Other definitions for adieu that I've seen before include "Gallic goodbye" , "A valediction" , "Comment on leaving" , "Vale" , "Auf wiedersehen" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.