The ornamental design for a handle for a clampingassembly, as shown and described.
FIG. 1 is a top right isometric view of a clamping assembly;
FIG. 2 is a top right isometric view of a handle for a clamping assembly;
FIG. 3 is a front elevation view of a handle for a clamping assembly;
FIG. 4 is a rear elevation view of a handle for a clamping assembly;
FIG. 5 is a top plan view of a handle for a clamping assembly;
FIG. 6 is a bottom elevation view of a handle for a clamping assembly;
FIG. 7 is a right elevation view of a handle for a clamping assembly; and,
FIG. 8 is a left elevation view of a handle for a clamping assembly.
The broken lines showing portions of the design in all figures is included for the purpose of illustrating environment and unclaimed features and forms not part of the claimed design.