The ornamental design for an accessorypiece for brassiere, as shown and described.
FIG. 1 is a top plan view of an accessory piece for brassiere;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a left elevational view thereof, the right elevational view being a mirror image thereof;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a front elevational view thereof, showing my design being used with a brassiere.
The partial human figure shown in long-short-short broken lines illustrates the environment in which the design is worn and forms no part of the claim. The uniformly-segmented broken-line rectangle on the face of the design is an unclaimed feature.