Crossword Genius

Insubstantial stuff (5)

Ross

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've seen this clue in the Newsday.
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