The ornamental design for a closure, as shown and described.
FIG. 1 is an upper, front isometric view of a closure in the closed condition, and the closure is adapted to be mounted in the closed condition on a bottle or other container (not illustrated) for initial purchase by a consumer;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevational view thereof, the rear elevational view thereof being a mirror image;
FIG. 4 is a right side elevational view thereof, the left side elevation view thereof being a mirror image;
FIG. 5 is an upper, front isometric view thereof with the closure in the opened condition;
FIG. 6 is a top plan view thereof with the closure in the opened condition; and,
FIG. 7 is a front elevational view thereof with the closure in the opened condition, the rear elevational view thereof being a mirror image.
The broken lines in the drawings define boundaries of the claimed design and form no part of the claimed design.