Possible Clues:

• Are Derby disposed to loaf?
• Use your loaf to have this in black, but not white
• Characters from Derby are upset by baker's product
• Reuben holder
• Sandwich maker, sometimes (2 words)
• Dark bakery product
• *Deli supply
• The elderly British entering studied selection at bakery?
• Pumpernickel, eg
• Dense food dry with a beer drunk