__-toe (X's and O's game) (6)

I believe the answer is:

tictac

(Other definitions for tictac that I've seen before include "Bookmaker's arm signals" , "Bookies'' system of arm signals" , "Bookmakers' signing" , "Russian water-urn" , "Racecourse bookmakers' signalling system" .)

I've seen this clue in the Newsday.

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