Powder (4)
'powder' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for dust that I've seen before include "Unwanted fine powder" , "Fine powdery material that can be blown about in the air" , "Stud (anag)" , "Do household cleaning" , "Clean; fine powder" .)
'powder' is the definition.
(I know that talc is a type of powder)
This is the entire clue.
(Other definitions for talc that I've seen before include "Powder used as toiletry" , "After-bath powder" , "Cosmetic powder" , "Toilet powder - mica" , "Softest mineral on Mohs hardness scale" .)
(Other definitions for keg that I've seen before include "What's found at King's Head" , "Barrel as for beer" , "Sort of beer" , "Small beer cask" , "Small cask or barrel" .)