A Centrally Important Part or Person
This page is the CodyCross answer for the clue below from Mesopotamia, Group 963, Puzzle 2 (Cylinder Seal).
Question is: A Centrally Important Part or Person
and the answer is: LINCHPIN
Word Meaning:
LINCHPIN — A pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.
Definitions from Wiktionary.