Possible Clues:

• Site of a Monteggia fracture
• Careful, naturally, to bury this bone
• Bone in the 'pinkie' side of the arm
• It reaches to touch one's hand
• Lower-arm bone
• Arm twister?
• Bone connecting elbow to wrist
• Grateful nation buries partner in arms?
• 19-Across bone
• Pinkie-side arm bone