Tic-tac-toe sides

In a game of Tic-tac-toe, the board is divided into 9 equal squares which are arranged in a 3 x 3 grid. Each player takes turns to place their symbol on the board, traditionally ‘X’ or ‘O’. In this case, the answer to the crossword question is ‘XANDO’, which can be interpreted as a combination of ‘X’ and ‘O’, the two symbols used in the game. Therefore, ‘Tic-tac-toe sides is XANDO‘ suggests that the answer to the crossword is either ‘X’ or ‘O’, both of which are used as sides in Tic-tac-toe.