Possible Clues:

• Leaf's central vein
• Leaf vein
• Central vein of a leaf
• Leaf’s central vein
• Was this the making of the first lady with part of the leaf?
• Leaves each one down the middle with this
• Leaves in the middle with this
• It's a flier I am up on the leaf
• Bird's taken off from motorway with something on a leaf
• Main vein