"La Douce" revealed by fair maiden (4)
I believe the answer is:
irma
'la douce' is the definition.
(I've seen this in another clue)
'revealed by fair maiden' is the wordplay.
'revealed by' indicates a hidden word.
'IRMA' can be found hidden inside 'fair maiden'.
(Other definitions for irma that I've seen before include "1963 film with Lemmon and Maclaine" , "The girl for Irish music award" , "- La Douce, nineteen sixty three Billy Wilder film" , "Girl's name ("La Douce")" , "- la Douce (1963 film)" .)