  We study cluster adjacency conjectures for amplitudes in maximally
supersymmetric Yang-Mills theory. We show that the n-point one-loop NMHV ratio
function satisfies Steinmann cluster adjacency. We also show that the one-loop
BDS-like normalized NMHV amplitude satisfies cluster adjacency between Yangian
invariants and final symbol entries up to 9-points. We present conjectures for
cluster adjacency properties of Pl\"ucker coordinates, quadratic cluster
variables, and NMHV Yangian invariants that generalize the notion of weak
separation.
