Possible Clues:

• Supermarket's stocked with tacky stuff? Virtually
• About equal to
• All but idiot grasps right answer
• Matching effectively
• Anonymous school idol holds onto first half of Xmas - or very nearly the same
• Virtually — gold?
• How is Martin not involved in the Good Samaritans or very nearly?
• That's the equivalent of sago mixed with soda