The ornamental design for a slat for an agricultural combine, as shown and described.
FIG. 1 is a rear perspective view of a slat for an agricultural combine according to an aspect of the present invention.
FIG. 2 is a rear view thereof.
FIG. 3 is a front view thereof.
FIG. 4 is a first end view thereof.
FIG. 5 is a second end view thereof.
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The surface shading and broken lines shown in FIGS. 1-7 represent portions of the slat for an agricultural combine that form no part of the claimed design.