Serpentine (5)
'serpentine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sinuous that I've seen before include "Wiggly" , "Full of curves, bends" , "Serpentine" , "Having many curves, undulating" , "Curving in and out" .)
'serpentine' is the definition.
(I know that serpentine can be written as snaky)
This is all the clue.
(Another definition for snaky that I've seen is " Serpentine".)