Bozo

Synonym for 1-Across

Use to frame, as evidence

What a very drunk person in Catania might see looking north (much to the relief of Sicilians, there's really only one!)

This Mideast group with its heyday in the mid-2010s can be called 2-Down, if not much worse

Architect of the Louvre Pyramid and Dallas City Hall

Synonym (plural) for 6-Across

Resident of Isfahan or Shiraz

Actresses Chaplin, Laurence, and Roche

Blows to smithereens, less wordily