The term 'check mate' is a phrase used in the game of chess to indicate that one player has won the game. The crossword solutions for this term are ENDORSEE (8 letters), STUB (4 letters), AYE (3 letters), and DEPOSITSLIP (11 letters). ENDORSEE refers to someone who signs a document to give it legal validity, while STUB is a short remainder of a ticket or document. AYE is an affirmative answer or agreement, and DEPOSITSLIP is a form used to make a deposit at a bank.