Grandmasters last word ... and what the last word in 17-, 24-, 36- and 52-Across can be Crossword Clue

Today's (15 January 2019) crossword provided to us by L.A. Times Daily and the clue is "Grandmasters last word ... and what the last word in 17-, 24-, 36- and 52-Across can be".
The right answer or rather the best answer listed below:

Definition of "CHECKMATE"

a position in which a player's king is directly attacked by an opponent's piece or pawn and has no possible move to escape the check. The attacking player thus wins the game.

Example :

if the rebel forces succeed in cutting off the road, they will have achieved checkmate

the vice president checkmated that strategy

 The Crossword clue "Grandmasters last word ... and what the last word in 17-, 24-, 36- and 52-Across can be" published 1 time/s & has 1 answer/s. 

Crossword	Date	Answer
L.A. Times Daily	15 January 2019	CHECKMATE