Stupid holding court, you said, making general statement (6)
I believe the answer is:
dictum
'general statement' is the definition.
(a dictum is a statement)
'stupid holding court you said' is the wordplay.
'stupid' becomes 'dim' (similar in meaning).
'holding' is an insertion indicator.
'court' becomes 'ct' (abbreviation used in road names).
'you said' becomes 'U' (homophone of 'you').
'ct'+'u'='ctu'
'dim' going around 'ctu' is 'DICTUM'.
'making' acts as a link.
(Other definitions for dictum that I've seen before include "Formal statement - maxim" , "Utterance" , "Saw" , "Authoritative statement" , "Authoritative pronouncement" .)