Great game (4)
I believe the answer is:
main
This might be a double definition.
'great' is the first definition.
(thesaurus)
'game' is the second definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for main that I've seen before include "Ocean or principal pipe" , "Most important element" , "river in Germany" , "Foremost" , "one might expect tap water from it" .)