Blunt (6)
'blunt' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for obtuse that I've seen before include "Dim-witted" , "(Of angle) between 90deg and 180deg - dull" , "Dull, non-perceptive" , "Exaggerate" , "Not very perceptive or sensitive" .)
'blunt' is the definition.
(I know that blunt can be written as stark)
This is all the clue.
(Other definitions for stark that I've seen before include "Severely simple" , "Severe in appearance" , "Severe, bare" , "Arrant" , "Austere" .)
'blunt' is the definition.
(I've seen this before)
This is the entire clue.
(Another definition for plain-spoken that I've seen is " Candid, if blunt".)