Blare 'adieu' when this French poet goes off? (10)

I believe the answer is:

baudelaire

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

'this french poet goes off?' is the definition.
'baudelaire' can be an answer for 'french poet' (I've seen this before). I am not sure about the rest of the definition.

'blare adieu' is the wordplay.
'blare adieu' anagrams to 'BAUDELAIRE'.
But, I am unsure how this is indicated.

'when' is the link.

Can you help me to learn more?

(Another definition for baudelaire that I've seen is " French poet and critic, d. 1867 - audible ear (anag)".)

I've seen this clue in The Telegraph.

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.