Be fussily busy making frame for skirt (6)
I believe the answer is:
bustle
I believe this clue is a double definition.
'be fussily busy' is the first definition.
(as in bustling about)
'frame for skirt' is the second definition.
(historical type of frame for a skirt)
'making' is the link.
(Other definitions for bustle that I've seen before include "Victorian fashion" , "Sublet (anag)" , "A show of hurrying, or old skirt back padding" , "Subtle kind of hubbub" , "Excited activity of subtle sort" .)