According to the USGA Rules of Golf, a moveable straight indicator, with or without bunting or other material attached, centred in the hole to show its position
All answers having "According to the USGA Rules of Golf, a moveable straight indicator, with or without bunting or other material attached, centred in the hole to show its position" as clue:
4 Character Answers:
SAGO
9 Character Answers:
FLAGSTICK