Possible Clues:

• Crazed family gang drinks gin cocktail on board - making more room for gin? (10.5)
• Blows things out of all proportion perhaps by exaggerating what's in The Mirror
• Blows it all out of proportion perhaps to expose the little characters
• Sherlock Holmes prop
• It helps to read fine print as gang family signs arrangement
• It's easy to see through this family gang -- signs may be ominous
• Fine-print enlarger
• Exaggerate gin cocktail in window by bigger picture
• Solution to a problem with troublesome little characters?
• Sherlock Holmes costume accessory