The ornamental design for an apron-front sink, as shown and described.
FIG. 1 is a perspective view taken from the front, top, and left side of an apron-front sink in accordance with my new design.
FIG. 2 is a front elevational view of the apron-front sink of FIG. 1.
FIG. 3 is a rear elevational view of the apron-front sink of FIG. 1.
FIG. 4 is a right side elevational view of the apron-front sink of FIG. 1.
FIG. 5 is a top plan view of the apron-front sink of FIG. 1; and,
FIG. 6 is a bottom plan view of the apron-front sink of FIG. 1.
The left side elevational view is the mirror image of FIG. 4. The broken lines shown depict portions of the sink that form no part of the claimed design.