Not as tame (6)
I believe the answer is:
wilder
'not as tame' is the definition.
('wild' can be the opposite of 'tame' so perhaps 'wilder' is reasonable for 'not as tame')
This is all the clue.
(Other definitions for wilder that I've seen before include "American dramatist" , "Billy --, US film director and screenwriter" , "Less conventional" , "More primitive" .)