- - Game on a three-by-three grid
- - Game called "noughts and crosses" in Britain
- - Three-in-a-row game (hyph.)
- - Game on a 3 x 3 grid (hyph.)
- - Game of circles and crosses
- - Drawing game, often?
- - Cat's game game
- - Game with x's and o's
- - Kids' game that usually ends in a draw
- - American name for the game of noughts and crosses
- - Simple game for two
- - Game that's hard to lose
- - Game with a grid
- - Game with a board that resembles a pound sign
- - Pencil game that hints at this puzzle's theme, found in the first and last letters of 18-, 25- and 43-Across
- - Two-person pencil-and-paper game
- - Game of X's and O's
- - Game with losing lines in 18-A, 28-A and 48-A
- - Three-in-a-row game
- - Game in which crosses are used
- - Game featured in the movie "WarGames"
- - Game that's the hidden theme of this puzzle
- - Game that often ends in a tie
- - Game with half a dozen winning lines found in this puzzle
- - Game that's hard to win
- - Child's logic game
- - Game-winning cry
- - *Match game?
- - Simple game
- - three-in-a-row x-and-o game with squares
- - XXX-rated activity?
- - 3-by-3
- - XXX or OOO
- - Winning line
- - "Hollywood Squares" basis
- - What Brits call "noughts and crosses"
- - It's rarely won
- - The British call it "noughts-and-crosses"
- - Where one draws the line?
- - XXX activity
- - Theme of the puzzle
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