Barleywine
I was reading a book by Anthony Louis last night and he said if you come to the outcome card in the Celtic Cross and don't understand it, then you can use card #10 as the signifier to lay out another Celtic Cross. He said this was from A.E. Waite himself. I thought it was interesting and kind of similar to what we're talking about here.
The thread topic is clarifiers so I hope this isn't too off track to post here.
This is what Waite actually said in the PKT:
"If in any divination the Tenth Card should be a Court Card, it shews that the subject of the divination falls ultimately into the hands of a person represented by that card, and its end depends mainly on him. In this event also it is useful to take the Court Card in question as the Significator in a fresh operation, and discover what is the nature of his influence in the matter and to what issue he will bring it."
The "fresh operation" is a whole new Celtic Cross spread focused on the outcome card of the previous spread, if it happened to be a Court Card. In that sense it becomes a giant "clarifier" for the previous spread.