Sentence:  The next morning when she awoke, she told Darcy what had happened, and Darcy agreed that she should go to the police and this time ask them if they could put a <WSD>tracer</WSD> on her incoming phone calls, just in case he called again. 
Meaning of the word marked with <WSD> tags:  A request to trace the movements of a person or an object, such as a shipment.