textile - how do I add a class to a definition list?

Question

I'm using RedCloth to convert some textile text into html.

One particular scenario seems particularly apt for using definition lists.

With RedCloth, definition lists have this syntax (source):

- coffee := Hot and black
- tea := Also hot, but a little less black
- milk :=
Nourishing beverage for baby cows.

Cold drink that goes great with cookies. =:

I want to add the class "beverages" to that list (so that the generated code looks like <dl class="beverages">...). I've tried this:

(beverages)- coffee := Hot and black
...

I also tried:

-(beverage) coffee := Hot and black
-(beverage) tea := Also hot, but a little less black
...

This is the way you style the other lists (uls and ols) in textile, but it didn't work for dls. The text was rendered as a literal paragraph (<p>-(beverage) coffee := Hot and black</p>)

Is there a syntax for adding classes to definition lists in textile, or must I use raw html instead?