Bows (5)
'bows' is the definition.
('arc' can be a synonym of 'bow')
This is all the clue.
(Other definitions for arcs that I've seen before include "Portions of a circle" , "Segments of a circle" , "Curving trajectories" , "Streaks of electrical discharges" , "Cars (anag)" .)
'bows' is the definition.
('prow' can be a synonym of 'bow')
This is all the clue.