  In strongly compressible magnetohydrodynamic turbulence, obliqueness between
the large-scale density gradient and magnetic field gives an electromotive
force mediated by density variance (intensity of density fluctuation). This
effect is named ``magnetoclinicity'', and is expected to play an important role
in large-scale magnetic-field generation in astrophysical compressible
turbulent flows. Analysis of large-scale instability due to the
magnetoclinicity effect shows that the mean magnetic-field perturbation is
destabilised at large scales in the vicinity of strong mean density gradient in
the presence of density variance.
