Insolence of French intended (8)
I believe the answer is:
defiance
'insolence' is the definition.
(thesaurus)
'of french intended' is the wordplay.
'of french' becomes 'de'.
'intended' becomes 'fiance' (I've seen this before).
'de'+'fiance'='DEFIANCE'
(Other definitions for defiance that I've seen before include "show of rebellion" , "Aggressiveness" , "confrontation" , "Challenging behaviour" , "Disregard for authority" .)