Wagner's girl is more daring, removing clothes (6)
I believe the answer is:
isolde
'wagner's girl' is the definition.
(character from Wagner's opera Tristan and Isolde)
'is more daring removing clothes' is the wordplay.
'more daring' becomes 'bolder' (bold can mean daring or brave).
'removing clothes' says to take the centre (the letters which 'clothe' the rest are removed).
The middle letters of 'bolder' are 'olde'.
'is'+'olde'='ISOLDE'
(Other definitions for isolde that I've seen before include "Tristan and . . . . . . (Wager opera)" , "princess of legend" , "Lover of Tristan" , "Soiled like Tristram's love" , "Arthurian queen" .)