In court hearing unprepared for commotion (6)
I believe the answer is:
uproar
'for commotion' is the definition.
(uproar is a kind of commotion)
'in court hearing unprepared' is the wordplay.
'in court' becomes 'up' (up before a judge).
'hearing' indicates a 'sounds like' (homophone) clue.
'unprepared' becomes 'raw' (I've seen this in another clue).
'raw' sounds like 'roar'.
'up'+'roar'='UPROAR'
(Other definitions for uproar that I've seen before include "Noisy and angry protest" , "Loud noise and commotion" , "Outbreak of noisy and boisterous behaviour" , "Tumult, chaos" , "Lots of angry noise" .)