The ornamental design for an applicator, as shown and described.
FIG. 1 is a top, front, right perspective view of an applicator showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The unshaded regions within the shaded area form no part of the claimed design. The broken lines showing the remainder of the applicator are for environmental purposes only and form no part of the claimed design.