This is the procedure to follow:
-open the picture in photoshop.
1 - create and save a clipping path. The background and colorpatches become invisible when the image is imported in indesign
but stay available for color corrections.
2 - save as PSD-file (do not save as JPG, in order to keep transparency)
3 - place the files on an FTP server where we have acces to fetch them.