Linchpin

8 clues
Mainstay
Key element
Keystone --
Axle insert
Critical element
Crucial component
Crucial unifying element
Piece that holds the rest together
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Abbeylincoln
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Clinch
Clinchbyclinch
Clinched
Clinchedthedems
Clincher
Clinches
Clinchpins
Clinchthedeal