…uttering harsh expression (4)
I believe the answer is:
mien
'expression' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for mien that I've seen before include "Counterance - mine?" , "Personal bearing" , "aspect" , "Dignified manner" , "A countenance like mine" .)