Stiff and unemotional (7)
I believe the answer is:
robotic
'stiff and unemotional' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for robotic that I've seen before include "Using automatic" , "working mechanically" , "Stiff, unemotional" , "Like the Tin Man" , "Unthinking, like a machine" .)