Extravagant articles about to appear in court case (10)
I believe the answer is:
theatrical
'extravagant' is the definition.
(thesaurus)
'articles about to appear in court case' is the wordplay.
'articles' becomes 'the a' (two grammatical articles).
'about' becomes 'c' (abbreviation for circa).
'to appear in' means one lot of letters goes inside another.
'court case' becomes 'trial' (I've seen this before).
'c' put into 'trial' is 'trical'.
'thea'+'trical'='THEATRICAL'
(Other definitions for theatrical that I've seen before include "Artificial and exaggerated" , "Showbiz" , "Stagy" , "Relating to acting/actors" , "overdramatic" .)