The answer is a near synonym for "digestive", nothing to do with digestif. It's "bleep" as in what a "bleeper" does. So the answer will be a synonym for "digestive" which has the effect of changing the word "patrice" to one meaning "bleep". Hope that makes some sort of sense. It did to me when I wrote the clue.
I don't really want any hints yet, but I have several "answers" that I would like confirmed (or otherwise). Do people think that a thread for this might be a possibility?
(Though it would be difficult for people to use it without seeing answers that they don't want, I suppose.)
I found the niners section especially challenging. If I had known that certain clues wouldn't have the usual crossers I might have constructed them differently, but that's bilge, as AB would put it (water under the bridge). Most enjoyable nevertheless.