Having the same problem with this as I was having with "marginal material". Still not sure what to do. You have the terms "cause" and "effect" used twice. I suppose I could treat the definitions as separate unmarked marginal notes, and do the same for the "example".
I'm getting a little concerned here. This is not marginal material either. Please review the rule on marginal material.
Read the text to see if it refers to how this is called. Typically this type of graphic is called a word cluster and the preferred way of presenting them is by creating a tactile graphic. However, it is also acceptable to transcribe as an indented list. Insert a Transcriber's Note that says the following word cluster (or whatever the book calls it. Fine out!) is transcribed as an indented list. See the Formats rules on lists.
In this case there appears to be one cause with several effects under it.