Wireless Sensor Networks (WSNs) consist of uncountable tiny sensor nodes for transmitting data, used to track and monitor various applications. Scalability and secure data transmission pose two greater challenges in WSN. In this paper, a new Redpanda Optimized Secure routing in WSN (RASE-WSN) has been proposed towards enhancing packet delivery secure routing in WSN. It uses Fuzzy K-means clustering that divides sensor nodes (SN) into groups as clusters. Each cluster will be having a Cluster Head (CH) node, selected through the goat optimization algorithm. RPO will carry out the secure and optimized routing to enhance packet delivery ratio. Finally, the confidential transmission of the data goes to the Base Station. The proposed approach (RASE-WSN) saved energy by 42% when compared against the SHO-CH, CGRP as well as HHOCFR approaches.