  The temporal component of the heavy-light axial vector current is constructed
to one-loop order in perturbation theory and to order 1/M, where M is the heavy
quark mass, in terms of operators suitable for use in lattice simulations of B
and D mesons. The O(a)-improved clover action is used for the massless light
quark, where a is the lattice spacing, and propagation of the heavy quark is
described by a nonrelativistic lattice action.
