Bare, unadorned (5)
I believe the answer is:
stark
I believe this clue is a double definition.
'bare' is the first definition.
(I know that bare can be written as stark)
'unadorned' is the second definition.
(I've seen this before)
(Other definitions for stark that I've seen before include "Severe; sharply clear" , "Unclothed - unvarnished" , "Blunt, absolute; Freya ---, travel writer" , "Severely simple" , "Absolutely crazy" .)