Bows (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bows</span>' is the definition.<br/ ><span class="explanation-format__explanation">('arc' can be a synonym of 'bow')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bows</span>' is the definition.<br/ ><span class="explanation-format__explanation">('prow' can be a synonym of 'bow')</span><br/ ><br/ >This is all the clue.<br/ ></span>