Slimmest of the Long Bones; by the Tibia
This page is the CodyCross answer for the clue below from Inventions, Group 48, Puzzle 2.
Question is: Slimmest of the Long Bones; by the Tibia
and the answer is: FIBULA
Word Meaning:
FIBULA — An ancient kind of brooch used to hold clothing together, similar in function to the modern safety pin.
Definitions from Wiktionary.