Bring down main court statement? Not entirely (6)
I believe the answer is:
topple
'bring down' is the definition.
(I've seen this in another clue)
'main court statement? not entirely' is the wordplay.
'main' becomes 'top' (I am not sure about this - if you are sure you should believe this answer much more).
'court statement?' becomes 'plea' (I've seen this in another clue).
'not entirely' means to remove the last letter (most but not all of the word).
'plea' with its last letter removed is 'ple'.
'top'+'ple'='TOPPLE'
Can you help me to learn more?
(Other definitions for topple that I've seen before include "dethroned" , "Overthrow, cause to fall" , "Knock (from power?)" , "Remove from power" , "Knock off perch" .)