Answer:
I contain six letters, minus one and you got twelve. What am I?
You throw away my outside you cook my inside. Then you eat my outside and you throw away my inside.
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
What invention lets you look right through a wall?
Against the sun I protect your eyes and am often worn on the face of spies
Give it food and it will live, give it water and it will die.