Courage of woman round ancient city (6)
I believe the answer is:
valour
'courage' is the definition.
(valour is a kind of courage)
'woman round ancient city' is the wordplay.
'woman' becomes 'val' (val is a name for a woman**).
'round' becomes 'o' (round can mean a round object).
'ancient city' becomes 'ur'.
'val'+'o'+'ur'='VALOUR'
'of' acts as a link.
(Other definitions for valour that I've seen before include "Exceptional or heroic courage" , "Discretion is said to be the better part of it" , "Great bravery" , "Bravery, heroism" , "Courage in the face of danger" .)