Song from Marianne (4)
I believe the answer is:
aria
'song' is the definition.
(piece of music in an opera)
'from marianne' is the wordplay.
'from' says the answer is hidden in the clue.
'ARIA' is hidden in the letters of 'marianne'.
(Other definitions for aria that I've seen before include "Refrain" , "Opera solo" , "Repeated strain" , "Operatic solo, duet, etc" , "Summertime perhaps" .)