Calm, unmoved (9)
I believe the answer is:
impassive
I believe this clue is a double definition.
'calm' is the first definition.
(thesaurus)
'unmoved' is the second definition.
(I've seen this before)
(Other definitions for impassive that I've seen before include "Unflappable" , "Phlegmatic" , "poker-faced" , "Expressionless" , "Unconcerned" .)