Answer:

fibula

Answer	Crossword Clue
FIBULA	It extends from knee to ankle
FIBULA	Slender leg bone
FIBULA	Leg bone

FIBULA	Bone below the femur
FIBULA	Knee-to-ankle bone
FIBULA	It's part of a calf's anatomy
FIBULA	Calf bone
FIBULA	Long bone
FIBULA	Leg bone.
FIBULA	Bone between knee and ankle
FIBULA	Knee-ankle connector

FIBULA	Part of a calf
FIBULA	Bone whose name is Latin for "pin"
FIBULA	Bone whose name means "clasp" in Latin
FIBULA	Tibia's neighbor
FIBULA	Long leg bone
FIBULA	Bone whose name is Latin for "brooch"
FIBULA	Calf strengthener