Possible Clues:

• Picture-taking word
• It's said to make you smile
• What Packers fans wear on their heads
• Romano or Swiss
• Burger topper, sometimes
• Lasagna layer
• What one may say when being shot?
• With 58-Across, savory base for a canapé ... and the function of a black square in four puzzle rows?
• Roquefort or Stilton
• Blue or Edam, say