Protocols, records and types are not instances of OOP in my book. Polymorphism and abstract data types are concepts orthogonal to OOP and FP. The fact Clojure/Script has support for polymorphism and ADT does not mean it supports OOP.

If you want to claim it supports OOP, I'd say it does in the form of interop. Genclass, proxy, or defining classes in Java or objects in JavaScript and using them from Clojure/Script.

But, what is OOP exactly? We can debate this. I like to use Wikipedia's definition that it is languages where there is a construct, called an object, which groups together data fields and methods which can access and modify the data fields within.

Clojure/Script has no such construct. But one can define them in Java or JavaScript, and use them from Clojure/Script through interop.