Curve seen in sugarcane (3)
I believe the answer is:
arc
'curve' is the definition.
('arc' can be a synonym of 'curve')
'in sugarcane' is the wordplay.
'in' says the answer is hidden in the clue.
'ARC' is hidden in the letters of 'sugarcane'.
'seen' acts as a link.
(Other definitions for arc that I've seen before include "Part of a curve" , "Portion of a circle" , "Curvature" , "Section of circumference" , "be rapidly discharged" .)