Answer:
My first is high, My second damp, My whole a tie, A writer's cramp
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
What flies without wings? What passes all things? What mends all sorrow? What brings the morrow?
Sharp and long, flag of the world. What is it?
What lies in a tunnel of darkness. That can only attack when pulled back?
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.