Ensign Clancy was a 24th century Starfleet officer aboard the USS Enterprise-D during the mid-2360s.
In early-2365, she served as Lieutenant Geordi La Forge's assistant engineer, as part of the operations division. (TNG: "Elementary, Dear Data")
Mid-year she transferred to the command division, and served at the post of ship's flight control officer. She was in this position when the Enterprise-D intercepted the IKS T'Ong. (TNG: "The Emissary")
Clancy was played by actress Anne Elizabeth Ramsay.
The script for The Emissary spells her name as "Clancey".