Slow-witted (6)
'slow-witted' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for obtuse that I've seen before include "To be thus blunt" , "Blunt, not sensitive" , "Not very perceptive or sensitive" , "Dull or blunt" , "Angle greater than 90 degrees" .)
'slow-witted' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for stupid that I've seen before include "Lacking wit or intelligence" , "bovine" , "Idiotic" , "(Seeming to be) lacking intelligence" , "Brainless" .)