The ornamental design for a rearcombinationlamp for an automobile, as shown and described.
FIG. 1 is a perspective view of a rear combination lamp for an automobile.
FIG. 2 is a front elevation view thereof.
FIG. 3 is a left side elevation view thereof; and,
FIG. 4 is a top plan view thereof.
The portions of the rear combination lamp shown in broken lines are for the purpose of showing environmental structure only and form no part of the claimed design.