I'm not too concerned with how ti looks in FM, as long as it looks OK in PDF. Can you clarify what you mean by "try to replace that in the source graphic with no fill and then it may output properly in FM"?
Right now it's a tiff with transparency. Would a different format (e.g. an .ai file) work better?
re: Right now it's a tiff with transparency.
FM does not support transparency or opacity in raster images. It does allow clipping paths, but you need to know the trick.
Transparency, but not opacity, in at least some vector formats (EPS) does work, but only in the output path (not preview), and only if the object remains vector.
Basically you need to do all such layer compositing in an external app and import the final result.
Re: Conditional Watermarks Hidden Behind Graphics
Re: Is it possible to vary the opacity of a Framemaker-created graphic object?