Woman overturning wicked circle (5)
I believe the answer is:
olive
'woman' is the definition.
(woman's name)
'overturning wicked circle' is the wordplay.
'overturning' says the letters should be written backwards.
'wicked' becomes 'evil' (synonyms).
'circle' becomes 'O' (O is a circle).
'evil'+'o'='evilo'
'evilo' written backwards gives 'OLIVE'.
(Other definitions for olive that I've seen before include "Girl's name; tree" , "Fruit giving oil" , "Mediterranean tree-fruit - nice in martini" , "Fruit also used to make oil" , "Tree - shade of green" .)