Possible Clues:

• Strange sport
• It's played in rounds
• Weir's game
• Sport with greens and clubs
• With 16-Across, 9-, 37-, or 71-Across, for any given hole
• Game with drivers and carts
• Sport with tees and clubs
• Course sport
• Game with tees
• This puzzle's theme—according to Twain, it's "a good walk spoiled"