The ornamental design for a clasp for jewelry, as shown and described.
FIG. 1 is a top elevational view of a clasp for jewelry, the opposite side being a mirror image;
FIG. 2 is side elevational view of the clasp of FIG. 1, the opposite side being a mirror image;
FIG. 3 is an alternative side elevational view of the clasp of FIG. 1, the opposite side being a mirror image;
FIG. 4 is a perspective view of the clasp of FIG. 1; and,
FIG. 5 is an alternative perspective view of the clasp of FIG. 1.
The broken lines of FIG. 5 indicate an inner side of one part of the clasp and an outer part of a second part of the clasp only and forms no part of the claimed design.