The ornamental design for a clutchingjig, as shown and described.
FIG. 1 is a perspective view of a clutching jig showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof; and,
FIG. 6 is a top plan view thereof.
The broken line showing of the clutching jig is included for the purpose of illustrating portions of the clutching jig and forms no part of the claimed design.