Unimaginative or emotionless (6-2-4)
I believe the answer is:
matter-of-fact
This clue is a double definition.
'unimaginative' is the first definition.
(I've seen this before)
'emotionless' is the second definition.
(I've seen this before)
(Other definitions for matter-of-fact that I've seen before include "Down to earth" , "Unemotional and practical" , "Straightforward and unemotional" , "Commonplace" , "Unimaginative, emotionless" .)