Possible Clues:

• Bone
• The slice that will go around the head and top it up, by the sound of it
• Cut of steak; ribbon strip
• Top it up, by the sound of it, with a slice
• That may be a bit fishy, but don't let it go to your head
• Top it up, by the sound of it, without a bone in it
• Boneless piece of meat
• Boneless slice of meat
• Take back order, supposing that it's sliced fish or meat
• Boned side of fish