The ornamental design for clothesline, as shown and described.
FIG. 1 is a perspective view of a clothesline showing my new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is an enlarged perspective view of FIG. 2;
FIG. 4 is a top plan view of FIG. 3;
FIG. 5 is a front elevational view of FIG. 3, the rear elevational view being a mirror image thereof;
FIG. 6 is a bottom plan view of FIG. 3; and,
FIG. 7 is an enlarged end elevational view with respect to FIG. 6, the opposite end being a mirror image thereof.
The features depicted by means of broken lines in FIG. 1 have been shown for the purpose of illustrating environment and form no part of the claimed design.
FIGS. 3 through 6 have been shown with symbolic breaks in length, wherein the appearance of any portion between the break lines forms no part of the claimed design.