Possible Clues:

• NBAers' game
• A'ja Wilson's sport, for short
• Shaq's claim to fame
• Court for King James, briefly
• Hoops, for short
• Steph’s sport
• It's played in the 5-Across, informally
• "Chillin' out, maxin', relaxin' all cool / And all shootin' some ___ outside of the school"
• Shaq's sport
• Court sport for short ,