  We present neutron scattering measurements on powder samples of the spinel
FeSc2S4 that reveal a previously unobserved magnetic ordering transition
occurring at 11.8(2)~K. Magnetic ordering occurs subsequent to a subtle
cubic-to-tetragonal structural transition which distorts Fe coordinating sulfur
tetrahedra lifting the orbital degeneracy. The application of 1~GPa hydrostatic
pressure appears to destabilize this N\'eel state, reducing the transition
temperature to 8.6(8)~K and redistributing magnetic spectral weight to higher
energies. The relative magnitudes of ordered $\langle m \rangle^2\!=\!3.1(2)$
and fluctuating moments $\langle \delta m \rangle^2\!=\!13(1)$ show that the
magnetically ordered ground state of FeSc2S4 is drastically renormalized and in
proximity to criticality.
