Arm bone on the pinkie finger side

ULNA

["**Hint:** This long bone in the forearm is paired with the radius and is located opposite the thumb side.\n\n*(This hint guides the solver by mentioning the forearm and its relationship to the radius, while avoiding direct reference to the pinkie finger or the answer itself.)*"]

The clue "Arm bone on the pinkie finger side" leads to the answer "ULNA" through an understanding of human anatomy. The clue is asking for the name of a bone in the arm that is located on the same side as the pinkie finger. When your palm is facing up, the pinkie finger is on the same side as the ulna bone, which is one of the two long bones in the forearm (the other being the radius). The ulna runs from the elbow to the wrist on the pinkie finger side, hence the answer "ULNA." There is no wordplay or pun involved in this clue; it is a straightforward anatomical reference.