In CS5 alt clicking in an adjustment layer (eg curves) permitted naming the layer and making a clipping path This does not happen in CS6.How do you do that in CS6?
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Double-click a layer's name to make it editable.
When you say "clipping path" you could literally mean Clipping Path as found in the dropdown menu of Paths panel. However, I suspect you mean Clipping Mask when a layer is clipped to the layer below. If so, press Alt as you move the mouse pointer between two layers so a little box and downward arrow appears then click to make the clip.
I think I understand about the naming now. If you create an adjustment layer by picking it from the bottom of the Layers panel, press Alt while you click the little button to get a prompt for a name after you pick the adjustment type from the list.