City that's a prime source of mozarella? (7)
I believe the answer is:
buffalo
'city' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for buffalo that I've seen before include "Bovid animal" , "-- Bill, showman" , "Zoo's inhabitant" , "part of New York state?" , "Horny beast" .)