The term 'Certain Sandwich' can be broken down into two crossword solutions: 'MELT' and 'CLUB'. A MELT sandwich is a type of grilled sandwich made with melted cheese, usually with other ingredients such as vegetables or meats. A CLUB sandwich is a type of sandwich made with three slices of bread, typically with layers of turkey, bacon, lettuce, tomato, and mayonnaise. Both sandwiches are popular choices for lunch or dinner.