Uproar and cheers after receiving first of cream cheese (7)
I believe the answer is:
'cheese' is the definition.
(ricotta is a kind of cheese)
'uproar and cheers after receiving first of cream' is the wordplay.
'uproar' becomes 'riot' (both can mean a disturbance or commotion).
'and' is a charade indicator (letters next to each other).
'cheers' becomes 'ta' (both can mean thank you).
'after receiving' means one lot of letters goes inside another.
'first of cream' becomes 'c' (1st letter of 'cream').
'riotta' going around 'c' is 'RICOTTA'.
(Other definitions for ricotta that I've seen before include "dairy produce" , "may come from Italian press?" , "Soft white cheese used in Italian cooking" , "cheese, Italian style" , "Sheep's milk cheese" .)