Chess or baseball (4)
I believe the answer is:
game
I believe this is a double definition.
'chess' is the first definition.
(thesaurus)
'baseball' is the second definition.
(thesaurus)
(Other definitions for game that I've seen before include "Play or sport" , "Creatures hunted for sport" , "hangman say?" , "Willing to try" , "Hunted wild animals" .)