Socialite and seductress ditching husband, a composer (7)
I believe the answer is:
debussy
'composer' is the definition.
(Claude Debussy)
'socialite and seductress ditching husband a' is the wordplay.
I cannot really understand how this works, but
'socialite' could be 'deb' (I have seen 'Young socialite ' mean 'deb' so perhaps 'socialite' could also mean 'deb') and 'deb' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for debussy that I've seen before include "Clair de Lune composer" , "Claude -, C. nineteen-twenty French composer" , "Note-writer" , "Claude -, Fr. composer" , "Claude, impressionist composer" .)