Bowmen must ignore her curves (4)
I believe the answer is:
arcs
'curves' is the definition.
('arc' can be a synonym of 'curve')
'bowmen must ignore her' is the wordplay.
'bowmen' becomes 'archers' ('archer' can be a synonym of 'bowman').
'must ignore' indicates named letters should be taken away.
'archers' with 'her' taken out is 'ARCS'.
(Other definitions for arcs that I've seen before include "Portions of a circle" , "Streaks of electrical discharges" , "Segments of a circle" , "formations not straight" , "Curves in cars" .)