Illicit whisky (6)
I believe the answer is:
'illicit whisky' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hootch that I've seen before include "Illegal liquor" , "Illicit whisky (colloq., variant spelling)" , "Illicitly distilled liquor" , "Drink" , "Illicit spirit" .)