Not out of the box, probably because java.util.function.Function seems like an afterthought in a strictly object-oriented language while Clojure has first class functions. In practice you don't interop with Java very much, let alone functional Java (as Clojure itself is a much better fit). But if it was useful, it'd be easy to write helpers for converting functions back and forth.

you'd use Clojure not Java for an example like the above

I think the context is when doing interop.

yes but I got the feeling the grandparent was confused so I tried to clarify that the only reason for the verbosity is interop - the Clojure code is much more concise than the Java - the interop code is like listening to a speech being translated between English and Spanish

functions. Macros are a super weapon and their use is reserved for very special cases. One reason is macros can't be composed as functions and also readability goes out the windows.