Six-sided figure (7)
I believe the answer is:
hexagon
'six-sided figure' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hexagon that I've seen before include "there are several sides to it" , "Shape of a honeycomb cell" , "A six-sided geometric figure" , "Six-sided polygon" , "Six-sided shape" .)