Related Clues:

• Cake made for a shower
• Bubble material
• It's seen in bars
• Word with bubble or opera
• Cake composition
• It's found in bars
• Zest, e.g.
• Ivory or Coast
• It's slippery when wet
• Cleansing agent
• Stuff in a bar
• Dove, e.g.
• Cleaning agent
• The end of each of 20- and 56-Across and 11- and 29-Down is a popular one
• Microbiologist's dish