Uninhibited; crude (6)
I believe the answer is:
earthy
This clue is a double definition.
'uninhibited' is the first definition.
(I've seen this before)
'crude' is the second definition.
(both can mean vulgar)
(Other definitions for earthy that I've seen before include "Coarse; unsophisticated" , "Suggestive of soil" , "Consisting of soil" , "Gross, like the soil" , "Like soil; uninhibitedly direct" .)