It helps if you tell which model number you have. I suspect it is the clip for the drum bias spring. Remove the two screws holding down the front of top deck (under the rubber covers) Lift front of deck and look on left front corner. There should be a spring visible. It is attached to the front left suspension rod so it may of slid down the rod. The clip fits onto the top ring of the drum and the spring then hooks on to the clip. It is there to pull the drum away from the out of balance lever on the right rear corner.
Lincoln Appliance NZ, January 2014