Clojure was released 10 years ago with 1.0 officially announced 8 and 1/2 years ago. Clojure adoption has been stagnant for a few years now. 8 jobs in London after 10 years, IMHO, represents a serious adoption problem.
Python was released 26 years ago, and it certainly didn't have the ecosystem or the popularity it has today 16 years ago.
There are certainly more than 8 jobs in London for Clojure. JUXT https://juxt.pro/index.html alone hires more people than that. Maybe you're just looking in the wrong places.