One stage above a stage 5 clinger. This person did not derive their obsession with the opposing person through sex, but simply through a random act of kindness. If you have ever been called at 4am and the other person "just wanted to talk" you have a stage 6 clinger on your hands.
A person, typically from the opposite sex, who has taken a keen attraction and obsession with you or another person based on subsequently little or hight amounts of social contact.
Often in most cases it is a female who has taken a serious obsession with a male and has reached the pinnical of the annoyance levels and usually wants to spend all her time with the male.