Answer: checkmate

AnswerCrossword Clue
CHECKMATEFinale for Fischer
checkmatein chess, to put (a player's king) in checkmate; to defeat or render incapable of counterattack
checkmateA final defeat or deadlock
checkmateA check from which a king cannot escape
checkmate(by a player) Announcing that the opponent's king is in such a position
CHECKMATEEarly '60s detective show
CHECKMATEResult of black's move from the upper-left board to the lower-right board
CHECKMATEDefeat
CHECKMATEKeep tabs on one's spouse?
CHECKMATELast word in a cerebral game
CHECKMATEMove that ends a game.
CHECKMATEGame-ending announcement
CHECKMATELast word in chess
CHECKMATEGame-ending declaration
CHECKMATEPay stub, from its friend's perspective?
CHECKMATEEndgame end
CHECKMATELikely last word to a patzer
CHECKMATECarefully review a crew member's work?