Bowmen destroy her cars (7)
I believe the answer is:
archers
'bowmen' is the definition.
('archer' can be a synonym of 'bowman')
'destroy her cars' is the wordplay.
'destroy' indicates an anagram (I've seen this in other clues).
'her'+'cars'='hercars'
'hercars' is an anagram of 'ARCHERS'.
(Other definitions for archers that I've seen before include "Their sport is the bow and arrow" , "Experts with bow and arrow" , "Old combatants" , "Agincourt soldiers?" , "Bowmen on BBC radio?" .)