They tell you where the answer can be found.
Before consulting that official answer, as a regular Luann reader but not a long-long-term fan, I was able to decode many of the individual clues, but could not give it an overall meaning. How will CIDU readers do, on either level?

Additional clue from CIDU

All the individual clues decode to the same thing.

Second additional clue from CIDU

It’s a number