Designing keywords in Clojure

I'm learning Clojure by developing a small web application.
Coming from java world, I'm trying to understand how to design my data using keywords.

How should I access a data structure (model) fields?
For example, I have a comment with a body field.
I'm using the keyword :body to access the model value,
but it seems very difficult in the future if I would like to change the body name to something else (for example content).

As for java, I would encapsulate it with a get function,
how should I use it in clojure?
What are the design pattern or best practices?