Italians make a meal of this reform of Riot Act (7)
I believe the answer is:
ricotta
'italians make a meal of this' is the definition.
(Italian cheese)
'reform of riot act' is the wordplay.
'reform of' is an anagram indicator (I've seen this in other clues).
'riot'+'act'='riotact'
'riotact' with letters rearranged gives 'RICOTTA'.
(Other definitions for ricotta that I've seen before include "Soft white cheese used in Italian cooking" , "Read the riot act about the cheese" , "one brought on board?" , "Italian 8 across" , "Italian 4 across" .)