  We consider the gauge invariant Drell-Yan hadron tensor which includes the
standard and non-standard diagram contributions. The non-standard diagram
contribution is appeared owing to the complexity of the twist three
$B^V(x_1,x_2)$-function where the gluon pole manifests. We use the contour
gauge conception which allows us to fix easily the spurious uncertainties in
the gluon propagator. The contour gauge condition is generated by the
corresponding Wilson lines in both the standard and non-standard diagrams. We
demonstrate the substantial role of the non-standard diagram for forming of the
relevant contour in the Wilson path-ordered exponential that leads to the
spurious singularity fixing.
