Starlings seem to love suet enough to drive off the various woodpeckers, chickadees, titmice, etc. Not anymore at our house.
I made a rough cedar box using 1" wood and aluminum nails. The dimensions are about 3" x 4" x 8". The bottom of the box is a piece of perforated plastic gutter guard. The top is hinged for filling with pieces of plain suet.
The starlings seem to be the only suet-eating bird that will not eat from an upside-down position. Young downies will sit on top of the feeder while a parent will scurry underneath for a tidbit to feed them.