Clojure generally has pretty good library support: the JVM has several high-quality web application servers: Jetty, Netty, Tomcat, Glassfish, etc. And, being a Lisp, Clojure can wrap these with a nice interface. The same is true in other areas: you have very nice access to the entire JVM ecosystem and really-well designed interop with the host language's concepts so, to a large degree, you never run into a situation where you can't do something because there isn't a good library for it: at work, we regularly use Kafka, Avro, Elasticsearch and several other major data systems and we mostly just use thin wrappers around the official Java implementations of the clients for these systems.

Similarly, when connecting to a database like Oracle, it's trivial to just use JDBC/etc. while, for example, my coworkers who are using Haskell generally have to write a Java gateway because there aren't well-tested clients for Haskell.