One group breaking record that's nutty

• Lean meat cut
• Chocolate made with hazelnuts
• Beurre __: hazelnut butter
• Morsel of meat
• Sweet piece of meat
• Sweet little letter containing crossword compiler’s admission?
• Piece of meat stuffing baguettes, I once recalled
• Small round cut of meat
• Lean fillet, as of lamb

Wiktionary Word definitions in Wiktionary
a. flavoured with hazelnuts n. a small round thick slice of meat (in particular, lamb or veal) that has been deboned