The ornamental design for a brassiere, as shown and described.
FIG. 1 is a view in perspective of a brassiere showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line illustration of environmental structure in the drawings is not part of the claimed design. The contrast shading in FIGS. 1, 3 and 4 represents a contrast in appearance (e.g., difference in sheen, texture, color and/or textile) but does not represent any particular texture, color, material, or finish.