Experts over piece of meat bringing in one to make ham (10)
I believe the answer is:
prosciutto
'ham' is the definition.
(I've seen this before)
'experts over piece of meat bringing in one to' is the wordplay.
'experts' becomes 'pros' (I've seen this in other clues).
'over' means one lot of letters go next to another (in a down clue, some letters go over others).
'piece of meat' becomes 'cut'.
'bringing in' indicates putting letters inside.
'one' becomes 'I' (Roman numeral).
'cut' placed around 'i' is 'ciut'.
'pros'+'ciut'+'to'='PROSCIUTTO'
'make' is the link.
(Other definitions for prosciutto that I've seen before include "Raw cured Italian ham" , "Meat" , "Italian food" , "sliced delicacy" .)