Possible Clues:

• Putting in time at this revolutionary diversion is fun
• Game played by hitting putts from 12 spots around a hole
• Register and turn left, oddly, for game
• Watch a scaled-down version of this game?
• Here one's putting the hours in?
• Putting game on a green with a dial
• Belt round, after record in game
• Putting on like this takes time, of course
• Putting in hours in the park at this?
• 19 down has no time for this sort of game