Speaker's expression, crude perhaps, bringing disorder (7)
I believe the answer is:
turmoil
'disorder' is the definition.
(turmoil is a kind of disorder)
'speaker's expression crude perhaps' is the wordplay.
'speaker's expression' becomes 'turm' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'crude perhaps' becomes 'oil' (crude is a kind of oil).
'turm'+'oil'='TURMOIL'
'bringing' is the link.
Can you help me to learn more?
(Other definitions for turmoil that I've seen before include "racket" , "upset" , "State of great disturbance or confusion" , "Wild disorder" , "Sturm und Drang" .)