Powder extracted from potent alcohol (4)
I believe the answer is:
talc
'powder' is the definition.
(talcing is a kind of powdering)
'extracted from potent alcohol' is the wordplay.
'extracted from' indicates a hidden word.
'TALC' can be found hidden inside 'potent alcohol'.
(Other definitions for talc that I've seen before include "Mineral used as a toiletry" , "Bathroom dusting powder" , "Perfumed drying powder" , "Softest substance in Mohs scale of hardness" , "In brief, popular body powder" .)