Well how do you ever get started when 20 down 23 and 14 are defined by each other with cross references, and are thus unsolvable?!
My way into the theme was 21d which is findable without knowing the definition, helped by getting the first letter from the crosser.
I had never heard the expression 23d 20 so that took a long time to piece together despite understanding what it must mean, as others have found. A bit of a bar steward…
22a is rather nice. I enjoyed the simplicity of 17d also.
A fun challenge from Paul today.