Marched round bend (3)
I believe the answer is:
arc
'bend' is the definition.
(arc can mean to curve or bend)
'marched' is the wordplay.
'ARC' is hidden within the letters.
But, I am not sure how this is indicated.
'round' acts as a link.
Can you help me to learn more?
(Other definitions for arc that I've seen before include "Bend" , "Section of circumference" , "Part of a curve" , "circle, partly" , "Segment of circumference" .)