Name of sauce = alcohol? Yes. Though, to be precise, the sauce doesn't have a name as such. I simply want a key French alcoholic liquid ingredient.
Provencale? No.
poached with mushrooms in white wine? It could be.

.. which is loosely connected to mushroom and white wine, which on reading the above has been indicated as a possibility. This may be my last guess. I simply don't know of any other sauce one might serve with Red S. And if someone else guesses the right sauce I WON'T throw any wobblies because I'm busy from now on and so don't really care :-)

He MADE me type this :-)

Who made who type it? You're both pissed. Disgraceful.

Chasseur? No.
Pastis? No.
Bouillabaisse? No.
I say again, the words on the card are not so much a particular sauce as a particular ingredient (French, alcoholic, liquid). In that sense (although only in that sense), the guesses of Pernod/Ricard are on the right track. And although the RedSnapper could be poached in mushrooms in white wine, the mushrooms are irrelevant, and there is a sense in which that particular recipe is unlikely, given what is on the card.
You might make more progress at this point if you stop thinking of this as a culinary puzzle...