Such a barrel hasnt yet been rifled (6)
I believe the answer is:
smooth
'such' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for smooth that I've seen before include "Unlined, unwrinkled" , "Even; without jerks" , "Free from roughness, bumps etc." , "Not rough or wrinkled" , "Polished" .)