Fly without power (5)
I believe the answer is:
glide
'fly without power' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for glide that I've seen before include "Gelid (anag.)" , "Soar" , "Fly without power" , "Move smoothly, as a sailplane" , "Move smoothly along a surface" .)