I was thinking a scripting language really: JavaScript/CoffeeScript/TypeScript (presumably using Node), Lua, Python, etc. Even PHP is acceptable because I have evolved a particular style in that language that I find makes it significantly less unpleasant than most would imagine

I’m not completely against Clojure. I tried it for a couple of weeks many years ago and found it kind of difficult somehow. I’ve done a reasonable bit of Haskell since so it would probably be better now. My first choice for a lisp would be Racket. I’m not saying no, we’d have to discuss it more I think. Isn’t the big justification for Clojure the Java libraries?