Arab precipitate about Government put on trial (7)
I believe the answer is:
arraign
'put on trial' is the definition.
(I've seen this before)
'arab precipitate about government' is the wordplay.
'arab' becomes 'ar' (abbreviation in Chambers).
'precipitate' becomes 'rain' (raining is a kind of precipitating**).
'about' indicates putting letters inside.
'government' becomes 'g'.
'rain' going around 'g' is 'raign'.
'ar'+'raign'='ARRAIGN'
(Other definitions for arraign that I've seen before include "Accuse before tribunal" , "Accuse, put on trial" , "Bring to trial" , "Accuse, find fault with" , "Impeach" .)