Insubstantial stuff (5)
I believe the answer is:
fluff
(Other definitions for fluff that I've seen before include "Soft downy substance - bungle it" , "Botch" , "Mistake; soft fibres" , "mistake made by some player in action?" , "Nap" .)
I believe the answer is:
fluff
(Other definitions for fluff that I've seen before include "Soft downy substance - bungle it" , "Botch" , "Mistake; soft fibres" , "mistake made by some player in action?" , "Nap" .)