Basis of some insurance fraud
I believe the answer is:
arson
'basis of some insurance fraud' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arson that I've seen before include "Crime of fire raising" , "Be pettish" , "Felonious burning of property" , "Iniquitous behaviour" , "It may get you in court" .)