Great puzzle! Loved.the cluing on it. solvable without being too straightforward.
I have one comment on 11D , the wording is just a little off. Rappers spit bars, as a noun. Thus, they could spit AT bars, meaning they're rapping while at a bar, or they could simply spit bars, but i dont think they can spit TO bars.
Very interesting linguistic question, and if i misinterpreted your clue, cant wait to be corrected!!! :)