This is an old Scot’s word meaning furrow or a drain. The burn, which traverses the 16th and 3rd fairways, is so called.
An accurate tee shot is essential and would be played with a two iron or three wood for the longer hitter, to finish short of the burn which crosses the narrow fairway. The tee-shot should be played down the right-hand side of the fairway to avoid the penalising bunkers on the left. The green slopes away from the player so the second should be firm with plenty of bite.