Service discovery is one of the most difficult aspects of MANETs. The primary concern is the assignment of the optimal service to the service requester. This work intends to address this issue by proposing a clustered trustworthy service discovery scheme. The Cluster Head (CH) node selection and recycling, ?SERV?_AD, request, response and service ranking are the crucial phases of this work. The CH node is chosen by considering the trust parameters like mobility, energy and number of neighbors. The selected CH node calculates the level of trust for each of its member nodes by employing trust criteria such as energy consumption, packet forwarding ratio, and node behavior. The node responsible for requesting services delivers the SERV_Req packet to the CH node, which thereafter searches its local memory for the corresponding service. Finally, the matching services are evaluated based on the distance of the service, the level of trust and the workload of the service provider. As significant metrics are considered for recommending service, the service requester is assured with reliable and faster service provisioning, which is proven by the experimental results.