Not curved (7)
I believe the answer is:
angular
'not curved' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for angular that I've seen before include "Having sharp lines and corners" , "with geometric design" , "Sharp-cornered" , "Bony - lean - gaunt" , "Having sharp corners, lacking curves or smoothness" .)